# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,718 questions, page 664
1. ## Physics

A charge of -17 nC is on the X axis at the origin. A charge of -24 nC is on the X axis at 11 cm. Find the electric field (magnitude and direction) at 19 cm on the X axis. I believe to solve this problem, the equation E = kC (q1/r1^2) must be used for each

asked by George on April 10, 2017
2. ## chemistry

how to solve problem-car with 13.45 gallon tank gets 28 miles/gallon. If gas costs 3.543/gallon, how much it will cost to travel 1550 miles

asked by Anonymous on November 13, 2013
3. ## Math

Solve the Go.a ball was dropped from a height 80m above a concrete floor. It rebounded to the height 1\2 of its previous height at each rebound. After how many bounces is the ball 2.5 high

asked by Daisy on October 30, 2017

Write an equation to solve each problem. The sides of one cube are twice as long as the sides of a second cube. What is the side length of each cube if the total volume of the cubes is 72 cm^3? Would it be, 3x+6x=72? Thanks

5. ## Physics

Two charged smoke particles exert a force of 4.2x10^-2 N on each other. What will be the force if they are moved so they are only one eighth as far apart? F= 4.2x10^-2 N K= 8.99x10^9 e= 1.6x10^-19 Do I solve for r even though they're asking me to find the

asked by Ali on May 14, 2010
6. ## Algebra 2

Using the information given about a triangle, which law must you use to solve the triangle? Law of Sines, Law of Cosines, or Neither. ASA SSS SAS AAA SSA AAS

asked by Katy on February 13, 2012
7. ## physics

i cant solve this problem i need for help please through how many does a point on the earth's surface move in 6h as a result of the earth's rotation ? what is the speed of a point on the equator ? take the radian of the earth to be 6370 km thank you

asked by need for help on November 28, 2012
8. ## Physics

Stuck again. The paper just says that the position of an object is given by s(t)=t^3. When T=5sec find A. Position B. Velocity C. Acceleration I'm trying to use the "position equation" which is s=1/2 a t^2 = Vot However, what do I solve the equation for?

asked by Jack on October 28, 2008
9. ## math and slopes

Help. Determine the slope of the line. The line whose equation is 3x-2y=8 Solve for y by putting y on one side and everything else on the other. -2y=8-3x. Multiply by -1. 2y = 3x -8 and divide by 2 y=(3/2)x -8/2 or y= (3/2)x -4 The form for a straight line

asked by Wayne on April 18, 2007

what is the range for the following number? 900,700,500,600,600,300,600,200,100,200? pleASE! EXPLAIN HOW TO SOLVE THE PROBLEM..

asked by pat on January 19, 2011
11. ## Precalc/Triangles

Draw and solve any triangles satisfying alpha = 29 degrees a = 7 c = 14 I realize I need to draw a non-right triangle and label the sides but I am completely confused one what to do after I draw the triangle

asked by Greg on November 13, 2012

Just to see if we are talking the same language: Navigation triangle PZX LHA = 194.65 degrees (P) Lat of Z 51.74 degrees Lat of X 39.24 degrees Solve for distance p Thanks Mike

asked by mike on January 15, 2008
13. ## Math

invested 2000 gains 0.2 every odd numbered month final value after first month? i've tried solving this with a formula, but every formula i come up with is wrong. Could someone tell me how to solve this and plug in the right numbers into a formula?

asked by Amy on September 5, 2011
14. ## math

Glenn raced his motorcycle 30 times last season. He finished first 12 times, second 5 times, and crashed in 9 races. What percent of the races did he finish second ? Set up as a proportion and solve

asked by jacob on April 19, 2016
15. ## Math(Please respond, thank you)

The original equation was 1.7e-3 = (0.0015 -x)^2 / (0.025 +1/2x)(0.025 + 1/2x) Square root of both sides is 0.0412 = (0.0015-x) / (0.025 + 1/2x) Solve for x and when I put in -0.001 or 1.0e-3 it says that it is incorrect, I don't know why??

asked by Hannah on March 18, 2012
16. ## Math

I have a couple questions about the sums of geometric series. One. So the formula for the sum is t(n)=t(1)[(r^n)-1] But if my series starts at t(0), can I change the formula to t(n)=t(0)[(r^n)-1] ? Two. If, in the series, there is a different pattern in

asked by Anonymous on October 31, 2010
17. ## Math

Kelly was helping a friend with cleaning her bedroom. Kelly spent two hours and cleaned 80% of the room. what fraction of the room did Kelly help clean? How would I solve this - divide?

asked by Al on January 21, 2015
18. ## Physics

All I need is the formula for this. Can't remember it or what it's called, then I can solve it, thank you! The second harmonic of a guitar string has a frequency of 120 Hz. What is the length of the guitar string if the speed of the waves on the string is

asked by unknown on January 31, 2013

Please help, what operation should I use to solve this problem? Jessica bought 10.50 pounds of potatoes. The potatoes are sold in sacks of 20 if the potatoes cost \$1.99 per pound. How much money did Jessica spend?

asked by Jaliyah on December 31, 2014
20. ## Algebra 2

Okay so I need help with basically how to find the domain, range, and how to solve if it says Find the value of f(3). Let the f function be defined by f(x) = the square root of x + 1 for -1 is less than or equal to x less than or equal to 3. And 4 - x for

asked by Kendra on March 18, 2012
21. ## Math

What operation should I use to solve this problem? Jessica bought 10.50 pounds of potatoes, The potatoes are sold in sacks of 20. If the potatoes cost \$1.99 per pound how much money did Jessica spend

asked by Jaliyah on December 30, 2014
22. ## chem again

Use Charles Law to solve for the missing value of each of the following a) 80.0 mL, T1= 27 degrees C, T2=77 degrees C. V2 =? b)V1= 125 L, V2=85.0L T2=127degrees C T1=? c) T1=-33degrees C V2=54.0mL, T2=160.0 degrees C V1=? can somebody help me with atleast

asked by jerson on April 27, 2008
23. ## Chemistry 11

12.0 g of carbon reacts with 32.0 g of oxygen to form 44.0 g of Co2. if we react 20.0 g of oxygen with 20.0 g of carbon,how many grams of carbon will be used up?..... i have no clue where to start... can u just tell me the steps to solve similar problems

asked by priya on September 22, 2010

12.0 g of carbon reacts with 32.0 g of oxygen to form 44.0 g of Co2. if we react 20.0 g of oxygen with 20.0 g of carbon,how many grams of carbon will be used up?..... i have no clue where to start... can u just tell me the steps to solve similar problems

asked by priya on September 22, 2010
25. ## Math(Please someone respond, very confused)

The original equation was 1.7e-3 = (0.0015 -x)^2 / (0.025 +1/2x)(0.025 + 1/2x) Square root of both sides is 0.0412 = (0.0015-x) / (0.025 + 1/2x) Solve for x and when I put in -0.001 or 1.0e-3 it says that it is incorrect, I don't know why??

asked by Hannah on March 18, 2012

How would I set up this problem to solve it: Gene offers 30 mins. and 60 mins. driving lessons. He gave 8 lessons that lasted 7 hours. How many 60 minute lessons did he give?

asked by Davis on February 8, 2017
27. ## Algebra (urgent!)

A line has the equation x = my + b for some real nonzero constants m and b. a. In terms of m and/or b, what is the x-intercept of this line? b. In terms of m and/pr b, what is the slope of this line? I have no idea how to solve this, so please walk me

asked by Bella on January 14, 2009
28. ## Trig

Compute inverse functions to four significant digits. cos^2x=3-5cosx rewrite it as.. cos^2x + 5cosx -3=0 now you have a quadratic, solve for cos x using the equation cosx=(-5 -+ sqrt (25 +12)/2

asked by Kate on April 16, 2007
29. ## Algebra

Alise separated her pictures into 3 piles. Each pile contained 9 pictures. How many pictures did she have in all? Write and solve an equation to represent the problem. State the answer to the problem.

asked by Kenneth hoon on February 4, 2016
30. ## MAth

Malcom has 1/2 gallon of soup. He pours the same amount of soup into 8 bowls. which equation represents the fractional part of a gallon of soup, n, in each bowl? Please he;p solve with the letter n. thanks

asked by geo on May 14, 2014
31. ## Precalculus

Solve Cos^2(x)+cos(x)=cos(2x). Give exact answers within the interval [0,2π) Ive got the equation down to -cos^2(x)+cos(x)+1=0 or and it can be simplified too sin^2(x)+cos(x)=0 If you could tell me where to go from either of these two, it would be great

asked by Josh on February 23, 2012
32. ## Algebra

Can someone tell me if these problems have the right answers? I am tooooooo old to know this any more. I understand the first one, but 2&3 are vaguely familiar. 25x^2+25x+6=0 the answer is x=-1/2 +/- 1/10 #2 solve for V=1/3Bh for B answer is B=V/ 1/3h #3

asked by Algebra Parent on March 21, 2008
33. ## World History

Were currently studying the early middle ages in western europe. I have been assigned a huge ammount of homework and need some help on two questoins. Why would a lord grant an estate to a vassal? Describe the Franks? Neither was mentioned in class or the

asked by Joe Smith Bob on April 16, 2008
34. ## Physics

A student on a piano stool rotates freely with an angular speed of 2.95 rad/s . The student holds a 1.35 kg mass in each outstretched arm, 0.739 m from the axis of rotation. The combined moment of inertia of the student and the stool, ignoring the two

asked by marie on March 18, 2011
35. ## physics

A 40-g block of ice is cooled to −71°C and is then added to 590 g of water in an 80-g copper calorimeter at a temperature of 27°C. Determine the final temperature of the system consisting of the ice, water, and calorimeter. (If not all the ice melts,

asked by kevin on April 6, 2012
36. ## physics

A 40-g block of ice is cooled to −71°C and is then added to 590 g of water in an 80-g copper calorimeter at a temperature of 27°C. Determine the final temperature of the system consisting of the ice, water, and calorimeter. (If not all the ice melts,

asked by anthony on April 11, 2012
37. ## Chemisty

Calculate the number of milliliters of 0.738 M NaOH required to precipitate all of the Mg2+ ions in 148 mL of 0.541 M MgSO4 solution as Mg(OH)2. The equation for the reaction is: MgSO4(aq) + 2 NaOH(aq) Mg(OH)2(s) + Na2SO4(aq) _____________mL NaOH

asked by Eliazbeth on February 7, 2012
38. ## CHM 105

Vinegar contains ethanoic acid (CH3OOH).titration of 3.00g of vinegar with 0.12M NAOH Solution requires 23.0cm3 to reach the equivalent ppoint.what is the weight percentage of the ethanioc acid in vinegar?

asked by Ekekhide on January 6, 2016
39. ## Trignometry questions EASY HELP

1. Which is a solution to the equation below? sin2xsecx=1 2. What is the exact value of cos15 degrees? 3. Which expression is equivalent to the expression below? cos^2 xsin^2? 4. What is the exact value of cos2theta? one side is 8 and the other is 15 5.

asked by kalakalikalakali on June 29, 2011
40. ## Chemistry

A student mixed 75.0 mL of water containing 0.75 mol HCI at 25* C with 75.0 mL of water containing 0.75 mol of NaOH at 25*C in a foam cup calorimeter. The temperature of the resulting solution increased to 35*C. How much heat in kilojoules was released by

asked by Tarra on April 27, 2011
41. ## College Chemistry

Determine the concentrations of MgCl2, Mg2+, and Cl- in a solution prepared by dissolving 2.39 x 10^-4g MgCl2 in 2.50L of water. Express all three concentrations in molarity. Also display the concentrations of ionic species in part per million (ppm).

asked by Bailey on September 20, 2016
42. ## Chemistry

Determine the molar mass of a compound and its molecular formula if a solution of 1.00 g of the unknown is dissolved in 50 grams of cyclohexane. Cyclohexane freezes at 6.02 oC. The normal freezing point of cyclohexane is 6.50 oC and its kf value is 20.2

asked by Megan on December 4, 2013
43. ## Chemistry

A volume of 29.62 ± 0.05 mL of HNO3 solution was required for complete reaction with 0.8896 ± 0.0008 g of Na2CO3, (FM 105.988 ± 0.001). Find the molarity of the HNO3 and its absolute uncertainty. I have the molarity of HNO3 = 0.5667

asked by Amanda on August 29, 2012
44. ## chemistry

For the following reaction in aqueous solution: HNO2(aq) + NO3-(aq) HNO3(aq) + NO2-(aq) The net reaction will proceed from: a. ) left to right b. ) right to left c. ) the reaction will not occur would the answer be c) because each side of the the equations

asked by Anonymous on November 2, 2008
45. ## chemistry

A volume of 29.62 ± 0.05 mL of HNO3 solution was required for complete reaction with 0.8896 ± 0.0008 g of Na2CO3, (FM 105.988 ± 0.001). Find the molarity of the HNO3 and its absolute uncertainty. I have the molarity of HNO3 = 0.5667

asked by Amanda on August 30, 2012
46. ## physics

A particle (m=3*10^-6 g, q=5*10^-6 C) moves in a uniform magnetic field given by (60j) mT. At t=0 the velocity of the particle is equal to (30j - 40k)m/s. The subsequent path of the particle is? I know that the answer is: helical with a 40-cm radius. But i

asked by monique on July 1, 2014
47. ## physics

a concave mirror of diameter 40m is used with a 6cm tall object placed 20 cm from it. Where is the image? Can you check my solution Radius(R)=20cm Distance object(do)=20cm (2/R)=(1/do)+(1/di) (1/di)=(2/R)-(1/do) why do they give you the object height i

asked by shan on April 28, 2008
48. ## Math

The radiator in a car is filled with a solution of 60% antifreeze and 40% water. The manufacturer of the the antifreeze suggests that, for summer diving, optimal cooling of the engine is obtained with only 50% antifreeze. If the capacity of the radiator is

asked by Shane on November 24, 2015
49. ## economics

Calculate the mid-point elasticity of demand. The online bookseller wants to increase its total revenue by offering 10% discount on every book it sells.Its custmers are divided in 2 groups Group A and group B Volume of sales before the discount for Group

asked by Hilda on June 7, 2010
50. ## Help in Chemistry!!

You are given an aqueous solution of hydrofluoric acid. (Recall that hydrofluoric acid is a weak acid; When you are given an aqueous solution of a weak acid you always assume that the dissociation reaction of the acid in water has reached equilibrium)

asked by Mary on November 26, 2011
51. ## Algebra

b)The water line is given by the equation y=-2/3x-12 Suppose you want to put a pink flamingo lawn ornament in your backyard, but you want to avoid placing it directly over the water line, in case you need to excavate the line for repairs in the future.

asked by Mandy on June 26, 2008
52. ## Science

a donkey pulls a cart c,with a mass of 240kg attached to a log of wood w with a mass of 80kg on a horizontal toad.W is tied to the back of C by means of a inelastic ropf which is inclined at 30 degrees to the horizontal. the donkey applies a force of 170 N

asked by Shevonne on February 4, 2019
53. ## History

Can someone please proof read my essay! I am running out of time Please! edit,spell check,grammar please What was the impact of the Industrial Revolution The Industrial Revolution was a period from the eighteenth to the nineteenth century where major

asked by Ruth on March 4, 2010
54. ## Chemistry

1. Write the formulas of the principal molecular or ionic species present in an aqueous solution of each substance. (a) Sodium Chloride, NaCl Na+ + Cl- (b) Hydrogen bromide, HBr (c) Iron (III) sulfate, Fe2(SO4)3 (d) Ethanol, CH3CH2OH (e) Glucose, C6H12O6

asked by Sara on November 9, 2010
55. ## Grammar

Circle the adjectives that can be used with the nouns on the right . 1)upward 2)growing 3)recent (Problem) 1)steady 2)severe 3)reliable. (Supply) 1)available 2)increasing 3)public. (Concern) 1)immediate 2)effective 3)sufficient. (Solution) 1)affordable

asked by Maryam on June 3, 2013
56. ## Chemistry

Which of the following procedures involves a physical change in one of the substances? separating an oil from solution by cooling it

asked by Sara on October 13, 2015
57. ## Chemistry 110

Write the formulas of the principal molecular or ionic species present in an aqueous solution of each substance. (a) Sodium Chloride, NaCl (b) Hydrogen bromide, HBr (c) Iron (III) sulfate, Fe2(SO4)3 (d) Ethanol, CH3CH2OH (e) Glucose, C6H12O6 (f) Ammonium

asked by kim k on November 9, 2010
58. ## Math

Please help me solve these problem i have no idea how to do this. 720m/d= ____ m/min 1.5gal/min=______ qt/h 32yd/min=_____in./s 0.85km/s=______m/min 80mi/h=_______ft/s 20fl oz/min=_______qt/day

asked by Anonymous on May 2, 2011
59. ## English

17. For most academic writing, the types of evidence preferred include A. a combination of assertions and first-hand experiences. B. personal observations and opinions. C. facts, statistics, and expert testimony. D. general statements and quotations by

asked by Ariel on February 6, 2018
60. ## nature

hey guys i have hermot crabs that r realy realy realy sick!!!!!!!!! please help them!!!!there not moving there half way out of there shell !!!im scared!!!!!!any help? Thank you for using the Jiskha Homework Help Forum. First of all, where did you get your

asked by chemiii on September 13, 2006

ethics- (a). Harveston asserted that Narnia’s service was invalid in part because “the return of service states that process was delivered to “JoAnn Kocerek” and did not show that she “had the authority to accept process on behalf of Harvestons

asked by jon on December 9, 2011
62. ## Maths

3. Which of the following examples would show a negative trend? A) height and weight of students B) test scores and height of students C) outside temperature and heating bill D) none of these 4. The scatter plot below shows the relationship between the

asked by Like I'd Tell You. on March 4, 2016
63. ## Human Computer Interaction

Suppose you are working as an interface designer in Software Company where you have been tasked to design the interfaces of an e-learning application for kids of ages between 11 to 15 years. Keeping into view the design principles you have learnt in your

asked by Learner on February 7, 2019
64. ## Reiny: Set Theory

School counselor posted the following data after having had 150 students sign up for electives: Art - 65 students Band - 70 students Theatre - 50 students Not all students signed up for an elective.Show the data using Venn Diagrams. Shown with problem:

asked by Rosemary on April 10, 2013
65. ## Social Studies

Which of the following statements best summarizes the system of railroads shown on the map? A. The majority of the railroads that connected the North to the South were built by 1850. B. The railroads established by 1860 each began and ended at a major

asked by JP on November 29, 2016
66. ## Math algebra (urgent!) help me! Thanks a lot!! (;

Mr lol bought x oranges for \$30 and sold them at a profit of 5cents per orange. Write down the (i)cost price of an orange. (ii)the selling price of an orange When he had sold all except 20 of the oranges, he found he had received \$28. (iii) form an

asked by Click6 on June 18, 2011
67. ## Math

Mr lol bought x oranges for \$30 and sold them at a profit of 5cents per orange. Write down the (i)cost price of an orange. (ii)the selling price of an orange When he had sold all except 20 of the oranges, he found he had received \$28. (iii) form an

asked by Smartypants on June 18, 2011
68. ## Physics

A boat leaves the shore of a stream. It starts directly across from point A, as shown. The velocity of the boat is 5.2 m/s, at an angle θ = 25E as shown. The stream is 94 meters across, and is moving at 1.5 m/s. How far downstream from point A does the

asked by Bob on August 7, 2017
69. ## English

Could someone tell me what the voice style of Boo Radley (Arthur) in To Kill a Mocking Bird might be like? I'm guessing his voice is timid / fearful but how would I show that in my writing? (Note: I'm supposed to be Arthur when I write these entries) If

asked by Amy~ on June 3, 2010
70. ## computer programming

1. Scanf 5 names of you and your friends 2. Printf hi to all of them. 3. Ask all of them for their ages. 4. Printf the information in tables as shown below. Name age StudName1 19 StudName2 20 StudName3 18 StudName4 34 StudName5 12 5. Use selection

asked by AIRA on June 4, 2014
71. ## math;););)

Previously you found that a 15-degree counterclockwise rotationcenteredat(2,1)sendsthepoint(4,6)toanother point (x, y) ⇡ (2.638, 6.347). The diagram on the right shows the vector v in the same direction as vector [2,5], only with a di↵erent length.

asked by anonymous on January 12, 2017
72. ## English

I need help with homophone for a couple sentences I am stuck on. Sentence 1: The _____ in that phone booth has a shirt with a turtle-necked______. Sentence 2: The campers in their _____ are _______ about the reports of bears. Don't show your ____ while on

asked by Kameron on March 2, 2011
73. ## Cost Accounting

Estimating a cost function, high-low method? Reisen Travel offers helicopter service from suburban towns to john F. Kennedy Airport. Each of it's 10 helicopters makes between 1,000 and 2,000 round trips per year. The records indicate that a helicopter that

asked by Amanda on May 10, 2008
74. ## Physical Science

A car starts from rest and accelerates uniformly along a straight horizontal road at 3 metres second squeared for 4 seconds,after which it continues with a constant velocity for a further 6 seconds.What is the magnitude of the maximum velocity of the

asked by Anonymous on September 3, 2011
75. ## math

I can't figure this out after many tries. The closest I got to was 367. Please help me!! Add the appropriate signs (+, -,x,/) to complete each math problem. Each sign is to be used one time for each math problem. Solve each problem going from left to

asked by Elizabeth on May 16, 2019
76. ## Math

We are studying pythagorean Theorem. How do I set this up to solve? A jogger goes half a mile north and then turns west. If the jogger finishes 1.3 mi from the starting point, how far west did the jogger go?

asked by Jane on February 15, 2012
77. ## Math

I have the problem: A triangle has a base of 3.6 cm and an area of 22.32 cm squared. What is the height of this triangle. The teacher gave us the answer key and I know the answer is 12.4 but I don't know how they came to that answer. I can't figure out how

asked by Brandi on February 1, 2012
78. ## PHYSICS

Detrmine the resultant force if two force a and b act an cobject f a is85n atangle of20degre to the horzontal a f b is 125at anle of 60 degree solve the resultant force ?5kb363d

asked by Anonymous TARIKU on November 4, 2018
79. ## Physics

Three particles A, B, C start from the origin from the same time, A with velocity a along x-axis, B with velocity b along y-axis, C with velocity c in xy plane along a line x=y. What should be the magnitude of c so that they always remain collinear is (a).

asked by Edward on November 6, 2014
80. ## math

you borrow \$200 fro a friend to help pay for a new laptop computer. You pay your friend back \$12 per week. Write and solve an inequality to find when you will owe your friend less than \$60.00

asked by robin on October 24, 2018
81. ## physics

a 15.0 kg mass and a 2.00 kg mass are connected bya string that passes over a frictionless pulley, the 15.0 kg mass lies on a smooth inclined at 45.0 solve for the acceleration of the masses and the tension in the string

asked by bennie on October 14, 2012
82. ## Math

Your goal is to take at least 10000 steps per day. According to your pedometer, you have walked 5274 steps. Write and solve the inequality to find the possible numbers of steps you can to reach your goal. Can someone explain how to do this?

asked by EmberShy on February 9, 2017
83. ## Math

The temperature at noon in Los Angeles on a summer day was 88°F. During the day the temperature varied from this by this much as 7.5°F. Write and solve an absolute value inequality to find the range of possible temperatures for that day?

84. ## Physicas

A 12000 kg truck strikes the back end of a 750 kg car moving at 15 m/s. If the truck loses 7500 kg-m/s of its momentum to the car, what is the car's velocity after the collision? I'm not sure how to solve this one... Help please?!

asked by Emilee on November 22, 2016
85. ## math

David put 155 feet of plastic edging around the outside edge of the concrete surrounding his pool. The concrete in 17.5 feet wide, how long is the concrete. help me solve please, very confused.

asked by Packy on December 27, 2009
86. ## Calculus

Follow the steps below for the given function. (Do not use mixed numbers in your answers.) 2x + 5y = 1 Solve the equation for y. y = Differentiate this equation with respect to x. y ' = Complete the steps below to implicitly take the derivative of the

asked by Ant on June 13, 2013
87. ## chemistry 2

The voltaic cell reaction NiO2(s)+4H^+(aq)+ 2Ag(s)-->Ni^2+(aq)+2H20(l)+ 2Ag^+ has a E cell= +2.48V. What will the cell potential be at a pH of 5.00 when the concentration of NiO^2+ and Ag^+??? I need to know how to set this type of problem up to solve it

asked by Anonymous on April 30, 2012
88. ## Physics

A 12000 kg truck strikes the back end of a 750 kg car moving at 15 m/s. If the truck loses 7500 kg-m/s of its momentum to the car, what is the car's velocity after the collision? I'm not sure how to solve this one... Help please?!

asked by Emilee on November 22, 2016
89. ## Algebra

The area of a rectangular floor is represented by 9x^2+15x square feet and the width of the floor is 3x feet. Which expression represents the length of the floor? a. 8x ft b(3x+5) ft c(3+5x) ft d(9x^2+12x)ft I don't know how to solve this. Help please!

asked by softball lover on January 29, 2018
90. ## Calculus

I need help determining the intervals of increase, decrease and the intervals of upward and downward concavity given f prime. f'(x)=(64x^4 - 125x) ^(-2/3). Im not sure how to solve this. I know that the function has no intervals of decrease, its the rest

asked by Sam on October 23, 2014
91. ## math

what are division rules as it applies to the following 0/71= 23/23= 29/1= This is my daughter's 4th grade math and they are asking us to explain the didvision rules that are used to solve these problems. However they have not provided us with the division

asked by jennifer on October 13, 2008
92. ## Algebra, math

how do I find a value of x that will make each proportion true?? 12 = x ___ ___ 16 20 and 8 = 14 __ ___ 12 x Cross multiply to find x. Here's the first one; perhaps you can try the second one on your own. 12/16 = x/20 16x = 240 Divide both sides by 16 to

asked by Joe on April 9, 2007
93. ## math

crusty bought balloons at 5 for \$1 and sold them 3 for \$1. if his profit from selling balloons was \$20, how many balloons did he sell? 1- how much did crusty make for every balloon? 2- what open sentence (equation) would we wite to solve this?

asked by micaela on October 10, 2012
94. ## analytic geometry/graphing problem

The vertices of a triangle are the points of intersection of the line y=-x-1, x=2 and y = 1/5x + 13/5. Find an equation of the circle passing through all three vertices. I don't understand how to solve this: should I set them all equal to find the

asked by Knights on March 19, 2013
95. ## Math (Calc.)

1.Use the IVT to explain why the following is true. If f continuous on (a,b) and f(x) does not equal to zero for all x in the interval (a,b), then f(x) > for all x in the interval (a,b) or f(x) < 0 for all x in the interval (a,b). 2. You are given that a

asked by Dalia on September 17, 2013
96. ## Physics

A 4 kg bundle starts up a 30o incline with 128 J of kinetic energy. How far will it slide up the incline if the coefficient of friction between bundle and incline is 0.30? Pls help me solve this, I don't know what formula to use...

asked by Jeiffer on November 22, 2014
97. ## math

subtract: express your answer in simplest form. 5x-3/6 - (x+3)/6 answer choices a) 4x-1 b) 2x-3/3 c) 2x/3 -1 d) 2x/3 show me hou to arrive at the correct answer get a common denominator. get a common denominator. I thought 6 was the common denominator, why

asked by Diana on July 15, 2007
98. ## Physics

A thin massless horizontal pipe rotates about a vertical axis with angular speed ω as shown in the figure. A small bug, located at a distance r from the axis, starts crawling inside the pipe at constant speed v (relative to the pipe). Because of the bug,

asked by Jon on June 18, 2013
99. ## differetial calculus-related rates

LINEAR VS ANGULAR SPEED A wheel of a radius 30 centimeters revolves at a rate of 10 revolutions per second.A dot is painted at a point P on the rim of the wheel. a)find dx/dt as a function of ϴ. b)use a graphing utility to graph a function in part (a)

asked by =) on September 16, 2014
100. ## Algebra- Linear Functions and Equations

Greg is considering a text message plan that advertises: "A one-time joining fee of \$3.00 and \$0.08 per message." 1. Write an explicit formula for the text messaging plan. 2.Greg knows he sends and receives about 1800 texts per messages per month. Use an

asked by Kimmy on January 10, 2016