# Questions Asked onDecember 18, 2014

1. ## Algebra 1

Which method would be the simplest way to solve the system? 7x +5y = 19 -7x-2y = -16 graphing substitution elimination or distributive

2. ## Algebra

Points A(3,5) and B(7,10) are the endpoints of a diameter of a circle graphed in a coordinate plane. How many square units are in the area of the circle? Express your answer in terms of pi.

3. ## Algebra

If ab = 37 and xy = 1/37, what is the value of the product x • b • y • a? Use the commutative and associative properties of multiplication to evaluate.

4. ## Calculus

Determine the intersection, if any, of the planes with equations x + y - z + 12 = 0 and 2x + 4y - 3z + 8 = 0. I have no clue where to even begin. If someone could help and give me the steps to complete it, that would be greatly appreciated. Do I have to

5. ## Calculus

Determine the intersection, if any, of the planes with equations x + y - z + 12 = 0 and 2x + 4y - 3z + 8 = 0. I have no clue where to even begin. If someone could help and give me the steps to complete it, that would be greatly appreciated. Do I have to

6. ## Chemistry

Carbon monoxide and molecular oxygen react to form carbon dioxide. A 49.0 L reactor at 200°C is charged with 1.14 atm of CO. The gas is then pressurized with O2 to give a total pressure of 3.54 atm. The reactor is sealed, heated to 350°C to drive the

7. ## Math

in the woods is a cellular tower that is 72 feet tall and has a 60 foot shadow. next to it is a tree with a 40 foot shadow. how tall is the tree

toby signed a simple discount promissory note for \$20,000. the discount rate is 8.5%, and the term of the note is 90 days. what are toby's proceeds on the loan?

9. ## math

On April 12, Michelle Lizaro borrowed \$5,000 from her credit union at 9% for 80 days. The credit union uses the ordinary interest method. a. What is the amount of interest on the loan? \$ b. What is the maturity value of the loan? \$ c. What is the maturity

10. ## GEOMETRY

The sum of the measures of two exterior angles of a triangle is 264o. What is the measure of the third exterior angle? • 84o • 96o MY ANSWER?? • 112o • 124o

11. ## Math

What is a real world problem that compares the ratios 5 to 9 and 12 to 15.

12. ## PRE-ALGEBRA

1. 5h – 9 = –16 + 6h (1 point) 4 –7 7 10 2. 4x + 4 = 9x – 36 (1 point) –8 –7 8 –3 3. Which of the following equations has an infinite number of solutions? (1 point) 3x – 3 = –4x 2y + 4 – y = 16 7x + 5 = 4x + 5 + 3x 6y – 2 = 2(y – 1)

13. ## math

I'm trying to help my son with his homework and I have been out of school for some time...the question is: The floor of the recreation room at the YMCA is triangular with a base of 20 meters and a height of 13 meters. The YMCA wants to install carpeting

14. ## Math help

A boy has 380 prize tickets he wants to exchange for action figures at a prize booth. At this prize booth 5 tickets can be exchanged for a large action figure, and 7 tickets can be exchanged for 2 small action figures. The boy wants 4 times as many small

15. ## math

A girl walks 12 km at the speed of 3 km/h. what change should she make in her speed to take (i) an hour less and (ii) an hour more to cover the distance?

16. ## math

A company will need 55,000 for a new addition. To meet this goal the company deposits money in an account today that pays 5% interest annual compound quarterly. to meet this goal in five years what would the company need to deposit today?

17. ## math

A scientist is mixing a chemical solution for an experiment. The solution contains 3/8oz of chemical and 1/6 ounce saline solution. What is the rate of chemical to saline?

18. ## Science

Check my answers please? Imagine that you remove all the atoms from a chair. What remains? 1. nothing 2. a pile of dust I choose 1. Which of the following is not made of atoms? 1. heat 2. a solid 3. a gas I choose 1. What about matter is true? 1. atoms are

19. ## math algebra

What is y intercept of equation represented: X Y 150 1047 125 872 100 697 75 522 a. -3 b. 0 c. 3 d. 172 I come up with totally different answers than these. Do you use the y2-y1/×2-×1 ?

20. ## math

A punch recipe calls for 2/3 of pint juice to one pint soda, What is ratio of soda to juice?

21. ## Math

Simplify each expression and state any non-permissible values. (4 marks - show your work) x^2-2x divided by x+1 multiplied by x^2-1 divided by x^2+x-6 is the expression

22. ## math

A taco stand sells tacos for \$3.25 each. The stand’s expenses for the day are \$210. Define your variables and write an inequality to represent the amount of tacos they need to sell per day to make a profit, and then solve the inequality. Provide your

Read the following passage from the novel. A sergeant yelled at Johnny as he started to limp past them, but when he explained in a piteous whine that his foot had been squashed by a blow from a soldier's musket and all he wanted was to get home to his

24. ## Chemistry

You have a tank of helium with a volume of 10 liters that is currently under 40 atm of pressure. If you open the valve on the tank and release the helium into a room with a volume of 10,000 liters, how many atmospheres of pressure will the helium now be

25. ## math

If ten crates arrive at the receiving dock, and each crate contains 7 boxes of decorative vases with 12 vases per box; how many vases are in each crate?*

26. ## math

1.During the soccer season, Michelle attempted 130 goals and made about 70% of them. a. How many goals did Michelle make? b. The team made a total of 456 goals. What percent of the teams made goals did Michelle make? 1. 13 goals; 2.85% 2. 39 goals; 85.5%

27. ## P.E

1. One of your friends plays video games for at least six hours each day and gets upset when he has to eat dinner with his family. This is a sign of? a. An anxiety disorder. b. A phobia c. Bipolar disorder d. An impulse-control disorder 2. A phobia is an

28. ## Science

What allows small particles to move through cell membranes? Is it diffusion?

29. ## L.A.

Writeacher, I need some help on another question. It goes like this. Which of the following passages from the novel is evidence of Johnny's heroic actions? A. He had been assigned his own particular duty, this was to keep sharp track of Colonel Smith and

30. ## physic

Eight people are involved in a tug-of-war. The blue team members pull the rope with the forces of 220 N, 340 N, 180 N, and 560 N. Three members of the red team pull it with the forces of 250 N, 160 N, and 420 N. With what force must the fourth person pull

31. ## optional maths

(1+sec 2A) (1+sec4A) (1+sec8A) = tan8AcotA

32. ## Algebra 1

In which quadrant does the solution ofthen system fall? y=x-1 y= -3x-5

33. ## Physics

800 n student is standing in middle of frozen pond stranded 6.4 m from shore only thing he has is physics book which has mass of 3 kg so he throws it at 10 m/s toward one shore how long does it take him to reach opposite shore

34. ## algebra

You Found The perfect Chritmas present for your cousin . Macy's in kentucky has the item priced for \$35 . you have a coupon for 20% off and must pay 6% sales Tax . how much will the present cost you?

35. ## Physics

65 kg pole vaulter running at 10.2 m/s vaults over the bar. if height of bar was set at 4.96 m how fast was he moving as he cleared the bar

36. ## Technology - grade 9

Can someone tell me a brief summary on how to make an L.E.D light up when connected with only wires, nutes and bolts, battery and a paperclip.

37. ## Physics

starting from rest a 7.5 kg suitcase slides down a 30 degree frictionless incline a distance of 3.1 m upon reaching the bottom it slides an additional 5 m before coming to a stop. a) determine speed of suitcase at bottom of ramp b) determine coefficient of

38. ## physic

8. A torque wrench reads 25 lb ft. a. If its length is 1.0 ft, what force is being applied to the wrench? b. What is the force if the length is doubled?

39. ## Science

Can an egg or sperm be formed through mitosis?

40. ## math algebra

What is slope of line 8y = -16? a. 0 b. 2 c. 16 d. undefined dont have a clue how to do this

41. ## Science

How are respiration and fermentation similar? How are they different?

42. ## Math

The denominator of a fraction is one more then the numerator. If 2 were added to both the numerator and denominator, the new fraction equals 4/5. Find the original fraction.

43. ## math algebra

The length of the diagonal across the front of a rectangular box is 25 inches, and the length of the diagonal across the side of the box is 20 inches. The length of a 3 dimensional diagonal of the box is 28 inches. What is length of the diagonal across the

44. ## chemistry

The reaction for the complete combustion of acetylene is shown below. C2H2(g) + 5/2 O2(g) -----------> 2 CO2(g) + H2O(l) Î”H = -1299 kJ Use this reaction and the data below to calculate the heat of formation for acetylene. Î”Hf[H2O(l)] = -285.8

45. ## math algebra

Mauryn wrote the following Sandwiches at king sandwich cost same amount and include bread, meat, cheese, lettuce, and tomato. All other veggies are extra. Sam bought a chicken sandwich with 3 extra veggies for \$5.25. Erin bought roast beef sandwich with 5

46. ## science

A circular disk is rotating in a horizontal plane with a time period 3.14 second.At what distance from the center a coin of mass 10 gram may be kept so that the coin coin may remains stationary the coefficient of friction is 0.52?

I need help adding some stuff to this exam please help Exam 028005 It has come to my attention after a conversation with a DMD Medical Supplies representative that some of our work for them has been subpar. Knowing we are a customer driven company I did

48. ## STAT- important

What is the difference between normal distribution and approximate normally. Correct me if im wrong but I think the parameters of Normal is X~Normal (mu, standard deviation) but then approx. normal is X~Normal (mu, variation) im just really confused when

1. 5h – 9 = –16 + 6h (1 point) 4 –7 7 10 2. 4x + 4 = 9x – 36 (1 point) –8 –7 8 –3 3. Which of the following equations has an infinite number of solutions? (1 point) 3x – 3 = –4x 2y + 4 – y = 16 7x + 5 = 4x + 5 + 3x 6y – 2 = 2(y – 1)

50. ## stats

A jar contains 7 black balls and 25 red balls. You take 2 out without replacing them. Find a)the probability of drawing 2 red balls in a row, b) the probability of drawing a red ball, then a black ball, c) the probability that the two balls will be of

51. ## Math

The cost of staying at a hotel can be found using the function y = 129x + 9.95, where x is the number of days a guest stays at the hotel and y is the cost in dollars. The cost includes a flat fee for Internet access. If the fee for Internet access is not

52. ## Algebra

The half-life of a specific radioactive compound is 20 years. The equation used to model this half-life is y = 5 1/2(t/20) where t represents time. Currently, there are 5 pounds of this compound 15 feet below the earth's surface. When will there only be 4

53. ## algebra

Traveling downstream a certain boat went 21 mph. Traveling upstream it went only 5 mph. Find the speed of the boat in still water and the speed of the current.

54. ## Algebra

Find all real roots of the following equation. x^2 - (5/3)x = -2/3 Thx

55. ## physic

A 1250 kg wrecking ball is lifted to a height of 12.7 m above its resting point. When the wrecking ball is released, it swings toward an abandoned building and makes an indentation of 43.7 cm in the wall. a. What is the potential energy of the wrecking

56. ## science

NaOH + HSO -+ Which of the following is the number of moles of NaOH required to neutralize 1 mole of H2SO4 in the equation above?

57. ## science

Calculate the weight of gold having specific heat capacity 0.13 joule which is heated from 25 degree c to 300 degree c, where the heat absorbed is 1500 joule?

58. ## math

what is the value of x given the perimeter is 76, the length is 3x -6 and the width is x.

59. ## math

There are 27,878,400 square feet in one square mile. How many square feet are there in 35 square miles? Estimate by rounding the number of square feet in one square mile to the nearest ten million and the number of square miles to the nearest ten. Also

60. ## math

Which ratio compares 15m to 45cm?

62. ## math

* not multiple choice* 2/3n = 8 solving the system of equations 4x + 3y = 13 y= -x +4 * not sure how to do this the slope intercept form of the function that contains the point (-3, 2) and has a slope of -2? my answer: y= -2x + 6 -1 + 5(6-y) my answer is

63. ## physics

The movement of an object or a point mass at a constant speed around a circle that has a fixed radius is called uniform

65. ## math

w=80rmp r=2ft what is v=ft/min

If there are 70 questions and you get an 80 how many did you miss

67. ## Algebra math

The height H and beat of a ball after T seconds is given by H equals 80t team take away 16x2. how long did it take for the bout to hit the ground

68. ## staticsits

65 % college students believe that their online education. give the null hypotheis for testing the claim made by survey what is the null hypothesis

69. ## math

Please solve the system with the elimination method. Explain each step as it is performed. 5y = x 2x - 3y = 7 Would the elimination method have been your first choice to solve this problem?

70. ## Math

Simplify each expression and state any non-permissible values. (4 marks - show your work) 4x-1 divided by x^2+7x+12 divided by 2x-1 divided by x^2 +x- 12 is the expression Help me please and thank you.

71. ## Math

During the soccer season, richard attempted 80 goals and made about 65% of them. a. How many goals did Richard make? b. The team made a total of 327 goals. What percent of the team's made goals did Richard make?

72. ## Algebra 1

When solving a system of equations, how do you determine which method to use?

73. ## math

If my input is 24 and my output is 8 what is my rule

74. ## math

If Susan takes two tests and makes a makes a 54/100 on the first test and a 63/100 on the second test, and is given a third test and makes an 80/100(which can only count as 20% of her total grade for all three test, what is her final grade/score.

75. ## algebra

the sum of the least and greatest integer is 35 more than the middle integer

76. ## Math

What is the equation of the line that has a slope of 0 and passes through the point (6, -8) A. x=6 B. y=6 C. x=-8 D. y=-8

77. ## confused creative writing

In creative nonfiction, a quote is differentiated from fictional dialogue in that it: takes the liberty of re-creating someone's spoken or written words is closer to the truth than fiction dialogue can be edited to change the piece's emotional impact

Which of the following passages from chapter X reveals the Climax of the novel? A. outside the closed window on Tremont Street a small group of soldiers were marching stealthily toward the Common. These were the first they heard. But soon another group

79. ## algebra

When 40 is added to the number of miles Karen ran last week, the result is the same as adding 10 to 4 times the number of miles she ran last week. How many miles did Karen run last week?

80. ## Chemistry

I need help with this question. 1. You have a tank of helium with a volume of 10 liters that is currently under 40 atm of pressure. If you open the valve on the tank and release the helium into a room with a volume of 10,000 liters, how many atmospheres of

81. ## language arts

Which of the following passages from Johnny tremain is most useful in helping you determine what type of ruler general gage is? Select all that apply A. Sam Adams was so happy his hands shook worse then ever B. He was not brilliant but he was no tyrant C.

82. ## L.A

This isn't a question but if you have helped me in L.A today thank you. I just want to thank everyone for the help and everyone for helping each other! Happy holidays and have a wonderful Winter Break! :-)

83. ## chemistry

If we have : H2(g) + 1/2 O2(g) -> H2O(l) dHf= -285.5 Kj N2O5(g) + H2O(l) -> 2HNO3 dHf = -76.6 Kj 1/2 N2 + 3/2 O2 + 1/2 H2 -> HNO3 dHf = - 174.1 Kj then , what is the dHf of 2N2 + 5O2 -> 2N2O5

84. ## Math

She deposits \$5 or \$3.50 into her account. She made 14 deposits which equaled \$59.50. how many times did she deposit \$5 & how many times did she deposit \$3.50 - I don't know how to do this!

85. ## Chemisty

calculate the concentration of the solution of 6.4g calcium sulafte is added to 0.125l of water

86. ## phy

A weightless string is suspend on a frictionless pulley, a mass of 6 kg. is suspend at one end and mass of 10 kg. is suspended on the other end of the string, the tension in the string will be :

87. ## programming

Can someone teach me how to show whats on my computer screen to another computer's screen?

88. ## Chemistry

What is the HCl concentration if 65.8mL of 0.300M NaOH is required to titrate a 15.0mL sample of the acid?

89. ## physics

If you use a horizontal force of 30.0 N to slide a 12.0 kg wooden crate across a floor at a constant velocity, calculate the acceleration.

90. ## math

how do you rewrite the problem so the divisor is a whole number 48.4 (division sign)0.4 8.19 (division sign)0.09 3.7 (division sign) 2.1 2.39 (division sign) 0.05 45.218(division sign)0.23 233.58(division sign)10.2

91. ## Science

Which term describes a type of trait that is usually expressed only when an organism has two identical alleles for the trait? A- homozygous B- dominant C- heterozygous D- recessive My guess is A.

92. ## english

Peter attends 6 dance lessons each week, all year long. There are 52 weeks in a year. Peter missed 5 dance lessons while sick. How many dance lessons did Peter attend during the year?

93. ## algebra 1

solve -16x-2y=-18 and 8x+y=9 by elimination

94. ## math

oder these fractions and decimals from great to the 0.5,2/3,0.25,5/6,1/8

95. ## algebra 1

solve 5x-12y=-3 and 10x-4y=-25 by elimination

96. ## math

A watch is on sale for 15 percent off. Its discounted price is 76 dollars. What was its original price?

97. ## Music

I have a listening chart assignmentand I have no cue how to start?

98. ## Chem

So I corrected my errors but am still confused. Should I convert torr to ATM or KPa to get R?

99. ## science

Which of the following best describes the process of diffusion?

Which term describes a type of trait that is usually expressed only when an organism has two identical alleles for the trait? A- homozygous B- dominant C- heterozygous D- recessive My guess is D. Please help!

101. ## Ms. Sue

The answer was actually D- recessive.

102. ## Honors Physics

A canoeist is trying to paddle upstream in a river that has a velocity of 6.1 m/s. If he can paddle his canoe at a velocity of 6.2 m/s, will he make any headway? What will his velocity relative to the shore be?

103. ## Math

Two health insurance plans are offered to employees of a company. Plan 1 has a \$400 deductible and then pays 65% of the rest of the cost versus plan 2 that has a \$1000 deductible and then pays 75% of the rest of the cost. What would annual medical costs

104. ## math

6 eggs \$1.00 12 eggs \$2.00 18 eggs \$3.00 What is the constant proportionality that relates the price to the quantity of eggs?

105. ## algebra

A field goal is 3 points and the extra point after a touchdown is 1 point. a player made 21 field goals and extra point kicks for 49 points. Find the number of field goals and extra points that he made. FG= x extra point =y =49 x+y=49 did i set up the

106. ## language arts

which of the following statements best summarizes the "fiddler's bill" Bostonians had to pay for the tea party as described in section 1 of chapter 7 in chapter Johnny Tremain? A The port of Boston was closed to all ships, numbers of workers lost their

107. ## History

What were the major changes in sciences view of the nature of the universe and humanity's place in it between 1850 and 1914? How did these developments contribute to the age of anxiety? How are these changes reflected in philosophy, psychoanalysis, and

108. ## Math

Lindsay bought six cds at the mall: the original price was \$13 each but she got a discount, and only paid a total of \$58.50 for all six. what was the discount

109. ## Math

Let y = sqrt(7-x) Find the differential dy when x= 1 and dx = 0.4 Find the differential dy when x= 1 and dx = 0.02

110. ## chemistry

What mass of AgCl will be obtained by adding an excess of HCl to a solution of 0.34 g of AgNO3 ?

111. ## algebra 1

(7p+3)(p+1)find each product

112. ## reimbursement

New medicare payments systems and implementation of SC HI both came out to the? A. Balance budget act. B. Federal act 33-2 C. Retrospective payment system D. Health maintenance organization

113. ## CHEMISTRY

What is the effect of plus two degree celcius miscalibrated themometer on the enthalpy of neutralization?

114. ## math solution on algebra

If one side of equilateral triangle is 2 cm then find the area of this triangle

115. ## Statistics

What is the difference between normal distribution and approximate normally. Correct me if im wrong but I think the parameters of Normal is X~Normal (mu, standard deviation) but then approx. normal is X~Normal (mu, variation) im just really confused when

116. ## statistics

An IQ test was administered to a random sample of 26 mental patients and the mean was found to be 99.7. For this test, the population values are known to be normally distributed and with a population standard deviation of 15. Construct a 90% confidence

117. ## statistics

find the area under the curve y=3log1.2x between x = 1.2 and x = 3

118. ## AVIATION SECURITY

who is responsible for hiring and training checkpoint security supervisors? 1. federal government 2. airport operators 3. airline carriers 4. airport security managers I think it's B

119. ## english

mischief composition with 350 words

120. ## math

math question from applications of the derivatives. maths formula: V = 4/3(pi)r^3 dV = 4(pi)(3r^2) = 4(pi)r^2 But I don't understanding that how to get (3r^2) ?

121. ## math

A recipe calls for 4 part club soda to 3 part juice, how much juice is needed for 32 Oz of club soda?

122. ## biology,chemistry,physics

the contact process prepares purest form of sulphuric acid 2so2+o2=2so3 calculate its kp if following concentrations are found at equilibrium so2=0.59,o2=0.05 and so3=0.259

123. ## math

A tank is 1/4 filled of water.when 90 liters of water are pumped into it the tank becomes 3/4 full.how much water in liters does the tank hold?