# Questions Asked onDecember 13, 2010

1. ## Physics

At a rock concert, the sound intensity 1.0 in front of the bank of loudspeakers is 0.10 . A fan is 30 from the loudspeakers. Her eardrums have a diameter of 8.4 .How much energy is transferred to each eardrum in one second?

2. ## Physics

A 1125 kg car carrying four 80 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. The car bounces with maximum amplitude when its speed is 17 km/h. The car now stops,

3. ## Trig

How do you convert rectangular equations into polar equations? If x4−y4=xy , then r2=atan(b); What is a? What is b?

4. ## physics

1.) A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed 2.5 cm in bringing

5. ## physics

a popgun uses a spring for which k = 20 N/cm. when cocked, the spring is compressed 3.0 cm. how high can the gun shoot a 5.0-g projectile

6. ## calculus

Find the point P in the first quadrant on the curve y=x^-2 such that a rectangle with sides on the coordinate axes and a vertex at P has the smallest possible perimeter.

7. ## geometry

if triangle FGH~ to Triangle PQR, FG = 6, PQ = 10 and the perimeter of trinagle PQR is 35 find the perimeter of triangle FGH

8. ## math 11

i dontget how the textbook got the answer, h = -30cos[(1.43)x]° + 40 the question is: a paintball is shot at a wheel of radius 40 cm. the paintball leaves a cricuarmark 10 cm from the outer edge of the wheel. As the wheel rolls, the mark moves in a

9. ## chem

Excess fluorine, F2(g), reacts at 150°C with bromine, Br2(g), to give a compound BrFn. If 423 mL Br2(g) at 150°C and 748 mmHg produced 4.20 g BrFn, what is n? Predict the shape of this molecule using the VSEPR model.

10. ## Physics

A 16kg child on roller skates rolls 2m down an incline at 20 degrees with the horizontal. With no friction, what is the total kinetic energy of the child at the bottom of the incline?

11. ## english

In the memoirs, “Barrio Boy” and “No Gumption”, how are these two memoirs similar? How are they different? In what ways are the authors’ choices and depictions related to the subject matter of their stories? pleeeaaaasssseee helpp.

12. ## physics

The radius of Earth is about 6.38 103 km. A 7.40 103 N spacecraft travels away from Earth. What is the weight of the spacecraft at the following distances from Earth's surface?

13. ## AP World History

how did the japanese importation of chinese culture differ from that of vietnam and korea? Are these points correct? +++ Japan had a strong religion, Shintoism, while Viet. and Korea did not +++ Japan was the only place not physically connected to the

14. ## Math

2.) Bonnie is four years older than Clyde. Ten years ago she was twice his age. How old is Bonnie?

15. ## Chemistry

What is the percentage strength (v/v) of Diluted Alcohol, NF, which results from mixing 50 mL of Alcohol, USP (95.0%, v/v) with 50 mL of Purified Water, USP? C1xV1 = C2xV2 95% x 50ml = C2 x 97ml C2 = 49% This was an example my professor put up. I can not

16. ## physics

a ball mass 800g is dropped from height of 5m and rebounds to a hight of 3.8m the air resistance is negligible. calculate a. the kinetic energy of the ball just before impact b. the initial rebound speed of the ball c. the energy transferred to the ground

17. ## chemistry

The solubility of nickel (II) carbonate at 25 degrees C is 0.047 g/L. Calculate Ksp for nickel (II) carbonate.

18. ## Physics

A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 42 dB by an observer 10 km away. (a) What is the average power generated by the horn? W (b) What intensity level of the horn's sound is observed by someone

19. ## chemistry

Determine the molarity of nitrate ions in a solution prepared by mixing 25.0 mL of 0.50 M Fe(NO3)3 and 35.0 mL of 1.00 M Mg(NO3)2 Please explain fully do not know where to start?

36. ## Physics

An airplane of mass 1.3 104 kg is moving at 64 m/s. The pilot then revs up the engine so that the forward thrust by the air around the propeller becomes 7.2 104 N. If the force exerted by air resistance on the body of the airplane has a magnitude of 4.0

37. ## chemistry........help!! =)

How many grams of FeSo4 are required to prepare 0.50 L of a 0.010 M FeSO4 solution? I don't need the answer just shown how to do it! thanks

38. ## CHEMISTRY

how many grams of sodium carbonate are needed to prepare 0.250 L of an 0.100 M aqueous solution of sodium ions? well normally you go moles=grams/molar mass than M= moles/L but when looking for grams? what do you do........multiple .250 by .100 than divide

39. ## physics

a 500-g mass is attached to the end of an initially unstretched vertical spring for which k=30 n/m. the mass is then released, so that it falls and stretches the spring. how far will it fall before stopping? (the PEg lost by the mass must appear as PEe)

40. ## chemistry

Consider the hypothetical elements X and Y. Suppose the enthalpy of formation for the compound XY is -336 kJ/mol, the bond energy for X2 is 414 kJ/mol, and the bond energy for Y2 is 159 kJ/mol. Estimate the XY bond energy in units of kJ/mol.

41. ## physics

A person fishing hooks a 3.0-kg fish on a line that can only sustain a maximum of 35 N of force before breaking. At one point while reeling in the bass, it fights back with a force of 45 N. What is the minimum acceleration with which you must play out the

42. ## statistics

Suppose that a coin is tossed 100 times. Let X be the number of times that it shows heads. Find the mean and standard deviation of X.

43. ## chem class

Our teacher told us we had to do problems on our final on Delta G and S...? all he said is we'd have to plug in numbers from a list and solve. but im very confused. but the numbers he gave in the example are different from my book, is there soemthing we

44. ## Chemistry

Given 20.0 L of ammonia gas at 5C and 730 torr, calculate the volume at 50C and 800 torr

45. ## 10th grade math help

How do you solve? 3-3sinx-2cos^2(x) = 0

46. ## math

If the cards contain the following equations, what is the probability that a student will graph a line whose slope is 3? 3y = 9x + 3 x(x + 3) = 0 3x + y = 0 x = 3y x2 + 3 = 0 y - 3x = 0

47. ## chem

A molecular compound is composed of 58.8% Xe, 7.2% O, and 34.0% F, by mass. If the molecular weight is 223 g/mol, what is the molecular formula? Draw the correct Lewis structure. Predict the molecular geometry using the VSEPR model.

48. ## Algebra-Did I even begin correctly?

How would I write log(6)27-2log(6)3 as a single logarithm Would I start by getting rid of the (-2)- I know its the same log6 but what would I do with the 27 and the 3 I'm really confused on this one and I have to solve several similar ones with no clue on

If 720.0 mL of liquid water absorbs 80.0 kJ of heat, what will be its increase in temperature?

50. ## Chemistry

In the reaction: MnO2 + 4 HCl ---> MnCl2 + Cl2 + 2 H2O Calculate: The volume of Cl2 produced from the reaction of 10 grams of HCl with excess MnO2?

51. ## Physics

A 220 kg wooden raft sits on a lake. When a 75 kg man stands on the raft, it sinks 4 cm deeper into the water. When he steps off, the raft vibrates for a while. a) What is the frequency of the raft? b) What is the total energy of the vibration?

52. ## physics

A piece of glass has a temperature of 72.0 °C. Liquid that has a temperature of 37.0 °C is poured over the glass, completely covering it, and the temperature at equilibrium is 50.0 °C. The mass of the glass and the liquid is the same. Ignoring the

53. ## Algebra 1

Let x be an integer. What is the product of twice the integer added to three times the next consecutive integer?

54. ## chemistry

10.2 g of Pb(NO3)2 are dissolved in 100 mL of water, and added to 250.0 mL of a 0.250 M solution of KI. Determine the mass in grams of Pbl2 produced, and find the number of moles of the excess reagent. PLZ explain

55. ## phycis

A cylindrical tank has a tight-fitting piston that allows the volume of the tank to change. The tank contains 0.5m^3 of air at a pressure of 2*10^5 Pa. The piston is slowly pushed in until the pressure of the air is increased to 2.5*10^5 Pa. If the

56. ## chemistry

Based on molecular mass and boiling point of the five compounds in the table below, which should have the high? est dipole moment: first # molecular mass 2nd: boiling point compound 1 244 203 compound 2 346 255 compound 3 250 138 compound 4 246 146

57. ## science

A surveyor stands on one edge of a ravine. She determines that the ravine w is 140 feet wide. She then determines that the angle of depression from the edge where she is standing to a point on the bottom of the ravine a is 57.5°, as shown in figure below

how far will 350 j raise a 7 kg mass

59. ## Math

4). At diving competiotion, Jan's first dive received 9 scores that averaged 9.0. To calculate her final score for the dive, the highest and lowest scores were removed and the average was taken of the remaining seven scores. If her final score was 9.1,

60. ## Math Help in need of urgent assistance

A tower casts a 235-foot-long shadow. If the angle of elevation from the tip of the shadow to the top of the tower is 66.3°, how high is the tower? (Round your answer to one decimal place.)

61. ## physics

A person fishing hooks a 3.0-kg fish on a line that can only sustain a maximum of 35 N of force before breaking. At one point while reeling in the bass, it fights back with a force of 45 N. What is the minimum acceleration with which you must play out the

62. ## Chemistry

A protein found in some types of wood-rotting fungi is 0.40% copper by mass. Each protein molecule is known to contain 4 copper atoms. What is the approximate molecular weight of this compound?

63. ## physics

a piece of iron has a temperature of 18 degrees celsius. A second identical piece of iron is twice as hot. What is the temperature of the second piece of iron? Please explain why.

64. ## Cell Biology

What do the two steps of transcription followed by translation do?

65. ## Precalculus

1. A plane takes off, making an angle of a = 17° with the ground. After the plane travels m = one mile along this flight path, how high (in feet) is it above the ground?. (Round your answer to one decimal place.)

82. ## maths

How do i rearrange the equation to make d the subject. e = d/ab (d/ab has a square root sign over it)

83. ## Chemistry

Normal saline solution is 0.91%w/v Calculate thge concentration of this solution in grams per litre????

84. ## Chemistry

Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is

85. ## AP World history

What were the elements of the tang-Song economic prosperity? i looked in my book but I cannot find enough information. Please and Thank you.

86. ## math

what is the answer to this systems of equation using elimination 2x+3y=11 and 3x+3y=18

87. ## Chemistry

Hi, I'm trying to solve some chemistry problems, like the ones my teacher says will appear on our exams. The problem reads like this: What is the hydrogen conentration in a bleach sample that register 9.55 using a pH meter? My Attempt: Since this sample

88. ## math 11 - Ms. Sue i need your kind help

i dontget how the textbook got the answer, h = -30cos[(1.43)x]° + 40 the question is: a paintball is shot at a wheel of radius 40 cm. the paintball leaves a cricuarmark 10 cm from the outer edge of the wheel. As the wheel rolls, the mark moves in a

Greta is designing a page for the yearbook and needs to know the area of her 8 in. x 10 in. picture after she crops it. If she makes the length and width of the picture 5/8 of the original, how does the area of the picture change?

90. ## Trig

A curve with polar equation r=(8)/7sinx + 36cosx represents a line. This line has a Cartesian equation of the form y=mx+b ,where m and b are constants. Give the formula for y in terms of x . For example, if the line had equation y=2x+3 then the answer

91. ## ENGLISH

WHAT ARE THE METAPHORS IN THE POEM "THE RISK" BY ANNE SEXTON

92. ## chemistry

An ionic compound has the following composition (by mass): Mg, 10.9%; Cl, 31.8%; O, 57.3%. What is the formula and name of this compound?

Pick a team that you are currently a member of, a prior team in which you were a member, or search the Internet for an example of a real-life team. Be sure to choose one that meets these two criteria: (1) it’s not part of a for-profit business and (2)

94. ## Precalculus

A surveyor stands on one edge of a ravine. She determines that the ravine w is 140 feet wide. She then determines that the angle of depression from the edge where she is standing to a point on the bottom of the ravine a is 57.5°, as shown in figure below

95. ## Chemistry-Confused by titration!!

If a 28 mLs of a 0.25 molar NaOH solution is used to titrate 14 mLs of a nitric acid to its phenolphthalein endpoint, what is the molar concentration of the acid?

96. ## grammar

Choose the sentence that's written in the passsive voice. A. To Kill a Mockingbird was written by Harper Lee. B. Watch for the turn at the corner of the block. C. Alan and James know how to tell a story. D. The president was trying to develop his country's

97. ## chemistry

there is 4.5 grams of acetic acid in 100 ml of water. how many moles of acetic acid is that?

98. ## english- need a creative title!

For my english class i had to right a paper on civil war slang and how this topic releated to the book The Red Badge of Courage. I finished my paper but have no idea of a creative title. Im not good at thinking up good titles :/ have any ideas?

99. ## Calc

Find the integral of 2x/(x^2 + 6x + 13)dx

100. ## Calculus

Consider the function f defined by f(x)= sin x/x, x cannot equal 0 1, x cannot equal 0 a) At what points does the graph cross the X-axis? b) What is the relation between f(x) and tan x at points x cannot equal 0 at which f(x)=0? c) What is the behavior of

101. ## Windows 7

Is there anybody who understands the Windows 7 system and some of its problems? I'm having a tough time with Control Panel because it takes a REALLY long time to load, and it should load for a second. I may have to uninstall some programs and/or delete

102. ## Physics (Final Review)

Ok so tomorrow is my Physics final and I have so much depending on this one test ( all my other grades are 80 and above but this one is a low 70). I have studied for the final but if anyone could supply me with a list of most know formulas for physics I

103. ## Chemstry

A 5.00 gram mixture of CaO and CaCO3 is heated strongly. After heating, the mixture has a mass of 4.00 grams. What % of the original mixture is CaCO3?

There are 40 people at a picnic. There are 4 more children than adults. How many of each are there?

105. ## Polynomial

Create a polynomial that describes the perimeter of the outside figure: x + 8, 5, x, x, 2x, x + 8, 34 and inside figure: x + 12.

106. ## college maths

Translate and solve. A number n increased by 1/4 gives 1/9. Find n. (Points: 5) n=1/9 n= -5/36 n=1/36 n=1/18 is it B

107. ## Linear Algebra, orthogonal

The vector v lies in the subspace of R^3 and is spanned by the set B = {u1, u2}. Making use of the fact that the set B is orthogonal, express v in terms of B where, v = 1 -2 -13 B = 1 1 2 , 1 3 -1 v is a matrix and B is a set of 2 matrices

108. ## Physics

Lisa drops a stone from a wall that is 7.00m from the ground. How long is the stone in the air?

109. ## psychology

What comparisons can you make between psychoanalytical models and functionalism? Select one topic from each and tell why you don't support it. Select one topic from each and explain why you do support it.

Can you please check my answer? A spherical balloon has a volume of 268 cubic cm. If more air is pumped in so that its radius is 3 times as long, what is its new volume? My answer: 2,412 cubic cm

111. ## english

1. The element of argumentation that deals with the listeners desire to trust and believe in the speaker is called a. ethos b. pathos c. logos d. mythos One element of argumentation involves an appeal to the logical and rational side of human beings. This

112. ## world history

why did the united states seek to become a world power in the 1890'S?

113. ## hisory

Many historians argue that the vietnam war in Vietnam was a profoundly disillusioning experience for Americans. Would you agree? Did the Vietnam experience signal a fundamental shift in the American foreign policy? what have been the consequences for

114. ## ap chemistry

a gas has a pressure of 1.1 atm occupies a volume of 24 liters. What will the pressure be if the gas has a final volume of 19 liters at constant temperature?

115. ## chem

A gaseous compound has the following composition by mass: C, 25.0%; H, 2.1%; F, 39.6%; O, 33.3%. Its molecular weight is 48 g/mol

Okay, so what are the axiom names? (honors math) Should this go in the 8th grade place? Oh well...

3/8+y=-3/16

118. ## Physics

A stretched string fixed at each end has a mass of 41.0 g and a length of 8.80 m. The tension in the string is 41.0 N. Nodes Antinodes b.What is the vibration frequency for this harmonic?

119. ## math

The volume of a ball is 288 pi cm^3. Find the dimensions of a rectangular box that is just large enough to hold the ball. use 3.14 for pie

120. ## Physics

A rocket moves upward, starting from rest with an acceleration of 35.0 m/s2 for 5.63 s. It runs out of fuel at the end of the 5.63 s but does not stop. How high does it rise above the ground?

121. ## Math

In a twelve-team bowling league, if every team plays every other team four times during the season. How many games must be scheduled?

122. ## CHEMISTY

Determine the molarity of sodium cations in solution when 6.21 g of sodium sulflate are mixed with 2.97 g of sodium nitrate in pure water to produce 350.0 mL of solution.......please explain every step. thanks!

20xsquared+40 x+15=0

124. ## Government

A bill has been approved in the House and Senate, albeit in slightly different versions. The bill now goes to ??

125. ## s.s

what are the geography bee questions and answers of 2010

126. ## math

what fraction would you use to find 33 1/3% of 42

127. ## college

Tace the impulse, listing the steps in as much detail as possible, from which your brain sends the message to the approprirate muscles to lift a glass of water to drink. As in the previous Application Assignment, detail the steps involved in the

128. ## Chemistry

All amino acids (choose the correct choice) a) have the same side chains b) form zwitterions c) have the same isoelectric points d) show hydrophobic tendencies e) are essential amino acids

129. ## math

how would you write 0.316 in expanded form

130. ## inter med algebre

these were extra credit quest to help grade but i could not do these i asked so many people there were stumped can who gets this ques can u do the whole promlem pleasw. Questin; Pick a car and finf its top speed . Assuming that your chosen carnreaches its

131. ## Math

Andy was on his way to a marble tournament when he met Bob. Andy's bag of marbles was heavy, so he gave Bob 1/2 of his marbles plus 2. Then he met Alex and gave him 1/4 of his remaining marbles plus 5. Just before arriving at the tournament, he met Emily

132. ## RSNHS

What is the limit of 1-2x^2 -2cosx + cos^2x all over x^2? please answer ASAP. TY

133. ## math

which has a greater area, a circular garden with a diameter of 20 meters or a square garden with sides with sides that are 20 meters long

134. ## Chemistry

If you dilute 45.5 mL of 9.0 M Na3PO4 to a final volume of 200 mL, what is the final concentration in units of molarity?

135. ## Physics and chemistry

Chapter 1 & 2 Review Questions 1. Compare and Contrast the two main branches of physical science. 2. Distinguish between scientific laws and scientific theories. 3. Describe the steps of the scientific method. 4. Explain the objective of a consistent

136. ## physicis

How far will 350 J raise a 7kg mass?

137. ## slope algebra

given ab and its midpoint m. the coordinates of a are (-10,-3) and the coordinates of M are (-4,-1) a. find the coordinates of B. b. find the slope of am. c. find the slope that is perpendicular d. find the slope that is parallel e . write the equation of

138. ## math

Find the age, to the nearest month, of the people in your class. Use the average age in months as your zero and positive and negative numbers to write the age of each person in relation to the average. Work in a group to find a good visual way to display

139. ## Math

What is th evalue of x when y = 7 2 -3x +4y-1=0

140. ## calculus

the tangent line to the curve y=1/3(x^3)-3x^2+11x+15 is parallel to the line 9x-3y=2 at two points on the curve.Find the two points.

152. ## algebra

solve by graphing 2x+y=1 and x-y=2

9z=8

154. ## college maths

Ann and Grace mow the yard for $38 each mowing. During one summer they mowed 2 times and spent a total of$10 on gas. The girls split their earnings. How much did each girl receive? (Points: 5) $33$38 $66$76 this one is confusing its either C or D bt

155. ## computers

What ideas can you propose for the future of processor design? What do you think the limit of clock speed for a processor will be? How could a CPU communicate more quickly with memory? What could future cache designs look like? I've been looking in Google

156. ## Physics

A person places the speakers 4.0 m apart and connects a signal generator to both speakers that produces a single and consistent tone. (constant wavelength and frequency) He then walks to a point that is 2.0 m from one speaker and 2.3 m from the other. At

157. ## Chemistry-pH problem

If a weak acid has a dissociation constant of 6.4 x 10(-6), what is the pH of a solution of this acid in 0.10 molar concentration?

158. ## social studies

Why were their beliefs different?

159. ## Areas of squares and rectangles

a square with a side of 27 miles

160. ## math

Subtract. x+4x-1/3x - 2x+2/3x

161. ## algebra

Multiply. 2x-1/3x * x+1/2x

162. ## chemistry

Describe how a 250.0 mL aqueous solution of 1.50 M MgCl2 is prepared from a stock solution of 6.00 M MgCl2. ANSWER: Measure 62.5 mL of the stock solution into a container and dilute to 250.0 mL so what i need explained is where did 62.5 mL come from?

163. ## Physics

A rocket moves upward, starting from rest with an acceleration of 35.0 m/s2 for 5.63 s. It runs out of fuel at the end of the 5.63 s but does not stop. How high does it rise above the ground?

164. ## algebra

Solve. 2x-1/x=4

165. ## Spanish III for Whitney

I have a suggestion for you on the last post of Dec. 9. http://www.jiskha.com/display.cgi?id=1291947185 Sra

166. ## Pharmacology

Hi i need help on these two puzzle words. 1. Dropping of a liquid on or into a body part _ n _ t _ _ _ _ _ i _ _ [12 words] 2. A precise and detailed plan for the regimen of therapy for a patient _ r _ _ _ _ _ _ [8 words]

167. ## Pharmacology

Hi i need help on these two puzzle words. 1. Dropping of a liquid on or into a body part _ n _ t _ _ _ _ _ i _ _ [12 words] 2. A precise and detailed plan for the regimen of therapy for a patient _ r _ _ _ _ _ _ [8 words]

168. ## US History

For decades, America has been locked in hostile confrontation with the two great Communist powers, the Soviet Union and the People's Republic of China. We were engaged with the one at many points and almost totally isolated from the other, but our

169. ## English - Fools Crow

Hello! Has anyone read the novel Fools Crow by James Welch? I just need your personal opinions on the question: Does the novel also rewrite the dominant history? This is not my homework. I am not a student I am just discussing this book with some people

170. ## science

I am SOOOO stuck on this science question!! It's not that hard but, science isn't my forte..... here it is...." If the mass of the brick is 50 grams and it's volume is 9cm cubed, calculate the density of the block using the formula D = m/v." HELP

171. ## chemistry

a 52.0 gram sample or water increases in temperature due to the addition of a hot metal from 17.7 degrees C to 24.4 degrees C. How many calories has the water absorbed? how many calories did the metal lose?

You push a 250 kg desk with a force of 800N. The coefficient of friction is 0.2. What is the acceleration of the desk?

173. ## chemistry

give the name and formulas of the compounds that rust is composed of

174. ## Chemistry

Which one pair has the larger radius?Explain? a. Calcium atom or calcium ion b. Aluminum ion or Magnesium ion

175. ## APMEH

What does the book mean when they say..."the nobles pushed to reserve appointments to the officer corps of the armies, the bureaucracies,the government ministries, and the church exclusively for nobles"? This is during the 18th century

176. ## calculus

A ceiling in a new home rises 8 feet over a distance of 29 feet. Find the slope of this ceiling. Round your answer to two decimal places

177. ## math

What two numbers have a product of 3.6 and a sum of 3.8?

178. ## science

the temperture in which all motion of particles stop

179. ## calculus

what is the gradient of 2y-3x=21

180. ## chemistry

when 50 g of H2S reacts with 50 g of O2, how much SO2 will it produce?

181. ## science

Chapter 1 & 2 Review Questions 1. Compare and Contrast the two main branches of physical science. 2. Distinguish between scientific laws and scientific theories. 3. Describe the steps of the scientific method. 4. Explain the objective of a consistent

182. ## Algebra-Reiny please explain this

Hi Reiny, I posted this problem earlier and you responded but I don't get the reasoning- The problem was -2log8(x+1) = -8 you said multiply by -2 and then you put log8(x+1)=4(wasn't that dividing by -2) log8(x+1)^2 = 8 (how did you get to the power of 2

Joe wants to draw a triangle.the lengths are 5cm,12cm,and 13cm. A:will joe be able to draw the triangle?why or why not?

184. ## Biology

Which of the following is NOT found in the human central nervous system? A) hypothalamus B) forebrain (cerebrum) C) autonomic neurons D) medulla E) spinal cord

186. ## Math

i have to write this out in word form because it doesn't look rite when i use numbers... What is the value of X when Y=7? Problem: negative threeX to the 2nd power plus fourY minus one equals zero 2 -3x + 4y - 1 = 0

187. ## geometry

if x, x+3 and y are the lenghts of the sides of a triangle then _

188. ## marketing

7) The marketing mix

189. ## statistics

Suppose you have a data set that is normal and with a mean of 78 and a standard deviation of 9. Within what range would you expect to fine 95% of the data?

190. ## Geometry

Given triangleABC is congruent to triangleXYZ, if AB=3X-1, BC=5X+2, XY=7, and YZ=14, find X.

191. ## social studies

i need info on iran's nuclear program asap so can u tell me were to get it

193. ## Statistics

How do I go about giving a definition for wages and wage earners in quantifiable measures. Need help!!

194. ## maths

L =4 piesign Cx(x is below the line, solar constant) d squared Make d the subject

195. ## algebra

there are people walking their dogs at a park. There are 30 heads and 68 feet at the park. Write out the algebraic equations for this problem. Use P to stand for the number of people and D to stand for the number of dogs.

196. ## math

16g of mix for each litre of water so how many grams in 100ml

197. ## physics

the rate at which position changes with time is called acceleration. true or false?

198. ## physics

the rate at which position changes with time is called acceleration. true or false?

199. ## Physics

How do you determine the average velocity on a position-time graph?

200. ## physics

the rate at which position changes with time is called acceleration. true or false?

201. ## art

there are 6 hues called ____ hues what are they and how are they made?

202. ## college maths

Simplify 5+1/3 1/3 1/3 {1/9+1/9} 4 1787/2187 4 1792/2187 4 1784/2187 4 22/27 Is D the best choice not sre for this one

203. ## Physics

What factors affect the period of a pendulum?

204. ## MathMate - look at this

perhaps you can shed some light on this I seem to have a "mental block" here. http://www.jiskha.com/display.cgi?id=1292296754

205. ## Physics

How do the initial and final horizontal velocities of a projectile compare?

40/n = 28/22 what is n?

207. ## physics

what are the units for speed and gravity?

208. ## english

do we need a comma after "me" and capitalize "Now" She also said to me "now I have trouble with understanding the importance of following my nutritional diet?"

209. ## French

En quoi se distingue l’anthropologie comme métier de l’anthropologie pratiquée comme une science ? What does this mean?

6x-2x+8=x+5

211. ## Precalculus

Find sin(θ), cos(θ), tan(θ). Assume a = 40, b = 9, and c = 41.

212. ## History

What was "the late war" ? (My teacher said it's not Vietnam....) Thank you

213. ## biology

how are energy and enzymes involved in biochemical reactions

214. ## english

In this sentence, I think i need a comma after asking, right? When the communication was poorly understood,the nurse clarified the female patient's meaning by asking “I am not sure that I understand what you mean by 'depressed than usual’?"

215. ## college maths

subtract. 10 3/5-2 10/11= 8 38/55 7 743/55 7 38/55 Is D correct??

216. ## math

If a television produces a 8ms response time, and there are 1000 ms in one second, how many frames would lag per second is there in a 60 frames per second video game?

217. ## Precalculus

Solve the triangle ABC under the given conditions. a = 19, b = 8.2, c = 12 A= B= C=

218. ## Math

my problem is: From the box containing 5 red balls, 7 blue balls, 10 black balls. you select 4 balls what is the probabilty that EXACTLY 2 balls are black. so i know how to start it c(10,2)c(2,1) ---------- c(22,40 but how do you solve that ?

219. ## Math

How do you write a quotient that gives the same answer as 4.65\ 0.12?

220. ## math

what is the answer to g(x)=(5x-6)=2 when g(x)=b?

221. ## child care

thanks bobpursley ok 6 is not b so i think is a? and 20 if its 25-30% its b?

222. ## Algebra

How do I start to solve -2log8(x+1) = -8? I think -2log8(x+1) is log8^(x+1)to the 2nd but then what do I do because then I think I should do log-8/log8 = x+1)^2 but that doesn't work at all Thank you for any help you can give

223. ## social studies

how did native americans use the land and other mined resources?

224. ## social studies

How did the europeans settlers use the land and other mined resources?

225. ## math

Find sin(θ), cos(θ), tan(θ). Assume a = 40, b = 9, and c = 41.

226. ## Physics

A rocket moves upward, starting from rest with an acceleration of 35.0 m/s2 for 5.63 s. It runs out of fuel at the end of the 5.63 s but does not stop. How high does it rise above the ground?

227. ## Physics

A rocket moves upward, starting from rest with an acceleration of 35.0 m/s2 for 5.63 s. It runs out of fuel at the end of the 5.63 s but does not stop. How high does it rise above the ground?

228. ## algebra

(y-4)-(y-9)=5y

229. ## Math

I must simplify this expression. Am I correct? -4[-25-(9-3)]. I first subtract within the parentheses first -4[-25-(-6)] -4-(-31) = 27

233. ## Social Studies

Do mountains run through the majority of North Korea?

234. ## physics

- a 40 kf milk crate is placed on a 20◦ ramp. determine the force normal of the mil crate on the ramp.

235. ## math

Multiply. 3x-3/2x-2 * 4x/3

236. ## algebra

Simplify. x^2+3x+2/x^2-2x-3

Find sin(θ), cos(θ), tan(θ). Assume a = 40, b = 9, and c = 41. (Do not use mixed numbers in your answers.)

238. ## ALGEBRA

I believe this answer to be correct. Just need to know. -13

239. ## Math

my problem is: From the box containing 5 red balls, 7 blue balls, 10 black balls. you select 4 balls what is the probabilty that EXACTLY 2 balls are black. i know that you start it/set it up like this: c(10,2)c(2,1) divided by c(22,4) and i can get the

240. ## english

where can i find some reason to support this opinion "high schools should not only prepare students for college, they also need to help them prepare future possibilities."

what is 27×19 in expanded algorithm?

for a science project what questions can you ask about things that has to do with scientific process and how to solve it through forming hypothesis and give evidence about it like a question about population or something..

Find sin(θ), cos(θ), tan(θ). Assume a = 40, b = 9, and c = 41. (Do not use mixed numbers in your answers.) Okay for some reason I keep getting this problem wrong. For sin(θ) I put 9/41, but it's wrong. Could someone please tell what I did wrong.

244. ## Algebra 2

How do I find the inverse of a linear relation represented by the points (2,4) (6,8) (-3,9) (-7,-8)?

245. ## geometry

determine why Euler's formula continues to hold for the polyhedron formed by cutting corners off of an octahedron. a) for an octahedron V=__, F=__,E=__ b) when you slice off one corner of the octahedron, you (gain or lose)__ edges. C) therefore, the total

246. ## social studies

Why were the Europeans beliefs different

247. ## social studies

could someone tell me about an intresting place to visit in washington d.c. that starts with a c-z

248. ## math

What are deriviatives

Correct the sentences 1. Will you make cards for Valentines Day? 2. The teacher read Charlottes Web to the class in April. Thank you.

250. ## marketing

Calculate a forecast of the above demand using a 3- and 5-period moving average.

251. ## hum 176

Choose a form of popular media that you are passionate about. The media may be music, a book, or a movie. · Write a thesis sentence stating how and why it is more than just a piece of entertainment. The thesis must include why it is a legitimate form of

252. ## Math

please show how you would divide 35.6728 by 5.246

253. ## l.a

flowers for algernon trail play what are some questions to ask if you are the prosecution in the play to the doctors who did the operashun on Charlie in the story

263. ## COLLEAGE ALEGEBRA

QUES # 1 a STARTUP COMPUTER CAN SELL 1000 COMPUTERS IF THEY PRICE THEM AT $500. tHE NUMBER SOLD WILL INCREASE BY 10 FOR EVERY$1 decrease in the price. The company has fixed costs of $100,999, and each computer costs$300 to produce, Find the price that

264. ## economics 212

Which of the following pairs are examples of substitutes? a. popcorn and soda b. automobile and bicycles c. boats and fishing tackle d. wine and cheese

265. ## English

1. The food is thought to be made from eggs. (Is this sentence grammatical?)

266. ## math

were less than 50 lunches eaten in aweek? is the ans an estimate or exact?

267. ## Geometry

how would solve this inequality 106>19p+6+6p

268. ## Calculus II

Suppose that y = f (t) satisﬁes the diﬀerential equation dy/dt=y(2−y) and initial condition f (0) = 1. Find an explicit expression for f (t).

269. ## science

what are the global winds that effect north america?

270. ## Math

I am a 5-digit whole number. I have 4 different digits. There are no 7s or 5s and I only have one 2. My hundreds digit is the least. My tens digit is odd and is the sum of all the other digits. What number could I be?

272. ## physics

In 37.0 s, a pump delivers 552 dm3 of oil into barrels on a platform 29.0 m above the pump intake pipe. The density of the oil is 0.82 g/cm3. (a) Calculate the work done by the pump. (b) Calculate the power produced by the pump

273. ## medical terminology

Could someone please check my answers. If they are wrong could you give me the correct answer or tell me where to find it..Thanks in advance for all your help... 1.Uremia is the result of A. electrolye imbalance in the intracellular body fluids. B. a high

274. ## chemistry

What is the boiling point of the solution in which you are going to cook spaghetti if it contains 51.0 g of NaCl dissolved in 1.30 L of water? Assume the density of water is 1.00 g/mL. Use molar masses with at least as many significant figures as the data

275. ## math

1/2x+1/3y=5 1/4x+1/3y=4 elimination method

276. ## Social studies

What are The five basic terms associated with gender and sexuality are?

Beth has 60 toy cars and trucks 75% of them are blue.How many are blue?

278. ## Science

what creates the circulation of air or water that forms from uneven heating?

279. ## English

Thank you very much for your corrections. Here are some more sentences for you to check. 1) Queen Victoria ascended the throne in 1837 and reigned constitutionally until she died in 1901. She never overruled (synonym?) Parliament and was beloved (synonym?)

280. ## college maths

Find the LCD and add the fractions. 1/125 + 4/50= 11/24 1/1250 1/35 551/6250 (Points: 5) im not getting the concept of this some help is really needed please

281. ## Pre-Calculus

translate this polar equation into a rectangular form: rsin(2theta)=sin(theta) My answer: r2sin(theta)cos(theta)=sin(theta) 2rcos(theta)=1 2x=1 x=1/2 This is the only answer I can get and someone told me it's wrong. Would someone please help me with this

282. ## physicis

How much power does it takes to do 104 J of work in 8 seconds

283. ## geo (finals)

please help! i don't get these problems at all! a(4,3) b(7,4) and c(5,2) are midpoints of a triangle. find the coordinates for the vertices of the triangle!

284. ## Algebra II

How would I write log(6)27-2log(6)3 as a single logarithm I'm confused on this one Thanks for any help you can provide

285. ## Aims Math

what is the contrapositive of this statement "If two polygons are congruent, then they are also similar"

286. ## college

4y to the 5th power 81q to the 7th power ________________ X ___________________ 9q to the 2nd power 16y .

how old was Anne when she died

288. ## college math intermediate alg

4y to the 5th power 81q to the 7th power ________________ X ___________________ 9q to the 2nd power 16y .

2 1/4 double

290. ## algebra

10-d=19 What is d? I think it is -9.

291. ## geometry

The sum of the measures of the interior angles in a polygon is 540 degrees. How many sides does the polygon have?

292. ## math

which set is infinite? P = {positive numbers less than 60} Q = {whole numbers between 10 and 20} R = {intergers ge=reater than 18} S = {even numbers between 5 and 15}

Which acid,if it reacts in tincture of NaOH forms sodium hypochlorite?

294. ## Physics

A person places the speakers 4.0 m apart and connects a signal generator to both speakers that produces a single and consistent tone. (constant wavelength and frequency) He then walks to a point that is 2.0 m from one speaker and 2.3 m from the other. At

295. ## geometry

How do I figure out the dimensions of each room in a 1200 square foot house with a closet and bathroom the same size, a big family room, and two circular bedrooms?

296. ## physics

Why does a 10 gram bullet have more momentum traveling at 200m/s than at 20m/s?

297. ## English

Can you please check these sentences for me, please? Thank you very much. 1) The Victorians fostered the ideas of racial superiority. They believed that race were divided by both physical and intellectual differences. 2)As a consequence, some races were

298. ## college algebra II

using the quadratic equation solve: y^2+16+64=0