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

92,096 questions, page 709
1. chemistry

In Chemistry: what is ph during the titration of 20.00ml of 0.1000m triethylamine (ch3ch2)3n (kb=5.2x 10-4) with 0.1000m HCL solution after the additions of titrant : a) 0ml (b) 10.00ml (c) 19.00ml (d)15.00ml (e) 20.00ml (f) 25.00ml

asked by jain on October 17, 2011
2. chemistry

the pH of the solution obtained by mixing 400ml 0.1M acetic acid, 50ml 0.1M sulphuric acid and 50ml 0.3m sodium acetate is (Ka of acetic acid is 1x10-5)

asked by selvi on April 21, 2010
3. Chemistry

Calculate molarity of HNO3 please help? Calculate molarity of HNO3 prepared by dissolving 22.3 grams of HNO3 in water to make 875 ml of solution... Please help I'm stuck

asked by Alex on May 8, 2014
4. Math

Using the binomial theorem, Find the first three terms in the expansion of (x-(1/x))^5. My solution: C(5,0)x5 + C(5,1)(x4)(-1/x) + C(5,2)(x3)(-1/x)2 x5 + (5)(x4)(-1/x) + 10(x3)(-1/x)2 x5 + (-5x4/x) + 10(x3)(1/x2) x5 + (-5x3) + 10(x) x5 -5x3 + 10x The first

asked by Ed on January 9, 2011
5. general chemisty

Calculate the freezing point of a solution of 20.0 g methyl salicylate, C7H6O2, dissolved in 800 g of benzene, C6H6. Kf for benzene is 5.10°C /m and the freezing point is 5.50°C for benzene. A) -1.05°C B) 1.05°C C) 4.45°C D) 6.54°C

asked by Amy on September 26, 2010
6. Chemistry

if metal A is placed in an ionic solution containing metal B ions and no reaction occurs, then metal B is most likely: A.) a halogen B.) higher on the activity series C.) not on the activity series D.) a catalyst

asked by Lauren on November 28, 2010
7. chemistry

concentrated aqueous sulphuric acid is 98% sulphuric acid by mass and has a density of 1.80 g/l. Volume of acid required to make one litre of 0.1M sulphuric acid solution is

asked by Pooja on July 31, 2013
8. Chemistry

What will be the freezing point of a solution made by dissolving 5.25 g of naphthalene (C10H8) in 100.0 g benzene (C6H6?). The normal freezing point of benzene is 5.5°C and K f (benzene) is 5.12°C / m.

asked by Emily on September 4, 2014
9. Math

William solves the equation 5(3x-2)=15x-2. How many solutions does he find? A.0 solutions B.1 solution C.2 solutions D.Infinitely many solutions I'm only up to making it to: 15x-10= 15x-2 I was also wondering if I did anything wrong.

asked by Rabie on April 2, 2015
10. chemistry

Suppose that you have an unlimited supply of copper 2 chloride to react with iron. How many moles if copper would be produced by 34.0 grams of iron with the copper 2 chloride solution

asked by shelbie on October 29, 2012
11. chemistry

Suppose that you have an unlimited supply of copper 2 chloride to react with iron. How many moles if copper would be produced by 34.0 grams of iron with the copper 2 chloride solution

asked by shelbie on October 29, 2012
12. Math

Using the binomial theorem, Find the first three terms in the expansion of (x-(1/x))^5. My solution: C(5,0)x5 + C(5,1)(x4)(-1/x) + C(5,2)(x3)(-1/x)2 x5 + (5)(x4)(-1/x) + 10(x3)(-1/x)2 x5 + (-5x4/x) + 10(x3)(1/x2) x5 + (-5x3) + 10(x) x5 -5x3 + 10x The first

asked by Ed on January 10, 2011
13. Chemistry

What is the percent by mass of glucose in a solution containing .15 mol of glucose dissolved in 410 g acetic acid? The molar mass of glucose is 180g/mol.

asked by Lydia on March 1, 2013
14. science

Ethanol can also be manufactured from glucose, C6H12O6. C6H12O6 2CO2 + 2C2H5OH. A solution containing 18 kg of glucose makes only 0.92 kg of ethanol. Calculate the percentage yield of ethanol.

asked by sofia on April 13, 2014
15. Chemistry

Calculate the mass of water that must be added to .45 mol of glucose to make a solution of 15 percent by mass. The molar mass of glucose is 180g/mol

asked by Dal on March 1, 2013
16. Chemistry

I took 25 mL of an unknown weak acid and added it to 10 mL of NaOH solution. I measured the pH and got 2.88 with concentration of NaOH @ .0098 and weak acid at 0.0102. What is pKa for the acid?

asked by tc on May 5, 2012
17. chemistry

The solubility of an ionic compound is 30 grams of compound in 100 mililiters of water. If 60 grams of the compound is dissolved in 200 mL of water, the solution will saturated. t/f

asked by stella on December 6, 2010
18. Chemistry

Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790. torr and a

asked by Julia on March 29, 2007
19. 10

A runner is at the starting gate and hears the starting gun. He begins running with a constant acceleration ai = 0.55 m/s2. He crosses the finish line at d = 100 m and then begins slowing down. It takes him tr to cross the finish line. It takes him ts =

asked by joe on September 11, 2014
20. Macroeconomics

A bank has issued 4 billion in transactions deposits and 2 billion in time deposits and other nontransactions deposits. Its other liabilities and net worth equal 1 billion. The bank has 100 million in total reserves. The only reserve requirement that this

asked by Mel on October 13, 2010
21. Math

What is the median of Variable B? Scatter plot on a first quadrant coordinate grid. The horizontal axis is labeled Variable A. The vertical axis is labeled Variable B. Points are plotted at (two, two), (two, eight), (four, three), (five, one), (six,

asked by Marc-Anthony on January 19, 2016
22. Math

kory is standing near a building that has a shadow that is 14 feet long. Kris is 5.5 feet tall, and the length of her shadow is 3.5 feet. set up and solve a proportion to determine the height of the building.

asked by Jack on December 5, 2017
23. math help please

Identify the missing info that would be necessary to solve the following which type of graph would be more appropriate to represent the number of inches of rain during a 6 - week period a bar graph or a line graph? what is the missing info

asked by daniel on October 3, 2013
24. Algebra

If 3 is subtracted from the numerator of a certain fraction, the value becomes 2/3. If 10 is added to the denominator of the original fraction, the value becomes 1/2. Find the original fraction. Solve the problems by using 2 variables HOW DO I START THIS

asked by BIBIN on March 25, 2012
25. algebra1

How do i solve this problem? 2(x-3)-3(x+5)=3(x-2)-7 what are the steps to solving this equation? HELP!!! Multply out the parentheses and then combine terms First step: 2x - 6 -3x -15 = 3x -6 -7 -x -21 = 3x -13 Nox add x + 13 to both sides of the equation

asked by jason on March 22, 2007
26. Math

What is the median of Variable B? Scatter plot on a first quadrant coordinate grid. The horizontal axis is labeled Variable A. The vertical axis is labeled Variable B. Points are plotted at (two, two), (two, eight), (four, three), (five, one), (six,

asked by Marc-Anthony on January 19, 2016
27. Trig

assume A= alpha using complementary rule how do I solve for alpha? cos(2A+40) =sin(3A-60) I don't understand how to start the question. What are the steps in solving for alpha. Do i get cos to equal sin somehow?

asked by ALISON on September 1, 2011
28. English

Is this right? Complete subject: Sniffer dogs Simple subject: dogs Sniffer dogs trained to detect drugs, blood, and explosives can help solve crimes and save lives.

asked by Daniella on August 24, 2016
29. Math

A company’s profit is described by the equation P(x) = – 5x^2 + 300x + 15,000 where x is the price in dollars that the company charges for its product. What should the company charge for the product to generate the maximum profit? a.) \$20 b.) \$30 c.)

asked by Anonymous on February 4, 2014
30. Science Physics

On the surface of the Moon an astronaut has a weight of Fg = 120 N. The radius of the Moon is Rm = 1.74 x 106 m, the gravitational constant is G = 6.67 x 10-11 N m2kg2 and the mass of the Moon is Mm = 7.35 x 1022 kg. Solve numerically for the mass of the

asked by Precious on October 9, 2014
31. math

A book publisher is shipping a new book in boxes of 200. If 30 boxes fit in 1 shipping crate, how many books are in 20 shipping crates? Explain the mental math you used to solve the problem.

asked by Deshawn on September 2, 2014
32. Math 116

How do you write an inequality for this problem. You have a budget of \$2.500.00 and you want to buy 30 tons of rock for \$60.00 per ton. You also want to plant trees for \$84.00 per tree. Write an inequality that illustrates this problem and solve the

asked by Janeen on October 28, 2009
33. GEOMETRY

I'm working on a story problem that is using 30-60-90 triangles. I have to solve for the hypotenuse. The long leg is 6 feet. So, short leg would be 6 = x square root of 3 /3...Then I'm stuck. I know the hypotenuse is dbl the short leg

asked by sweet pea on February 12, 2016
34. Mr.mr

Make up two equations, one that is true and one that is false. Do not state which equation is true and which is false. 2. Create an example of an open equation that uses the variable x and would require two or more steps to solve. Can someone give me an

asked by Algabra on August 26, 2017
35. math

the bus route passes through sierra blanca/ which is 90 miles from el paso. about how laong does it take the bus to get t sierra distance = rate * time 90mi = 60mph * time solve for time

asked by chemiii on October 2, 2006
36. math

a store manager is accipting applications for part time workers. He can hire no more than 14 people. So far he has hired 9 people. Write and solve an inequality to determine how many more people the manager can hire

asked by rick on January 25, 2016
37. Math - 8th grade

We are just starting this section, and I'm confused...Please help me understand how to solve this inequality: (one fifth r is less than two) 1/5r < 2 Also, simplify: (the #s are exponents) z3 . z3 x12/x3 By 1/5r you mean r/5 or 1/(5r)? z^3 . z^3 = z^6

asked by Shawn on January 3, 2007
38. math

please help me to solve this assignment : consider a 2D mirror has a parabolic profile of y = (x-3)^2 + 5 facing toward y^+ direction. Prove that any beam of light in y^- direction that this hits the mirror will be reflected toward a particular point (i.e.

asked by deel on September 18, 2012
39. algebra

A farm raises a total of 220 chickens and pigs. The number of legs of the stock in the farm totals 520. how many chickens and pigs are there on the farm. using systems of equations to solve

asked by Jarrad on January 25, 2011
40. Algebra

The booster club raised \$102 in their car wash. They want to buy \$18 soccer balls for the soccer team. Write and solve an inequality to find out how many soccer balls they can buy.

asked by Zaria on November 12, 2012
41. Math

Solve the proportion: You can find the distance from a thunderstorm by counting the number if seconds between the lighting flash and thunder. For example, if the time difference in 21 seconds, then the storm is 7 km away. How far away is the storm if the

asked by Amy on January 9, 2016
42. Math

The minute hand of a clock is 6 inches long and moves from 3 o clock to 5 o clock. how far does the tip of the minute hand move. Express your answer round to two decimal places. Can you solve this?

asked by Deborah on April 21, 2014
43. integral confusion

integral of Sec[2x]Tan[2x] i know u is sec 2x du=2sec2xtan2x dx what would i have to multiply with du so it would equal tan 2x dx? if my question is confusing, then here's another example of what i'm talking about: integral of (3x-2)^30 dx u=3x-2 du=3 dx

asked by julie on November 26, 2007
44. math

suppose that one bacterial cell divides every 30 minutes to make 2 cells. write an expression to find how many cells there will be after 3 hours. then solve to find the total number of cells after 3 hours.

asked by jayson on August 31, 2012
45. Exact value

How to find the exact value of lim (2^h - 1)/ h h->0 Thanks in advance. If you use lim dx->0 of [f(a + dx) - f(a)]/dx = f'(a) and recognize 1=20 [20+dx - 2

asked by Jen on October 20, 2006
46. math, inequalties

THIS SEASON, NORA HAS 125 AT BATS IN SOFTBALL. BY THE END OF THE SEASON SHE WANTS TO HAVE AT LEAST 140 AT BATS. HOW MANY MORE AT BATS DOES NORA NEED TO REACH HER GOAL? PLEASE HELP, I NEED TO WRITE AND SOLVE AN INEQUALITIES THAT MODEL THE SITUATION. THANKS

asked by Justin on November 30, 2011
47. Physics

Two cars start from the same place at the same time. After two hours, one car has traveled 30% farther than the other. If one car's speed is 20mph larger than the other car's speed, what are the speeds of the cars? Solve algebraically

asked by Anna on September 19, 2010
48. geometry

brett is using wallpaper to decorate two walls of his bedrroom. each wall is 14 feet by 18 feet. if one roll covers about 27 square feet, how many rolls will brett need to cover both walls? how do u solve it idk

asked by tiny on November 27, 2009
49. Phsyics

Two cars start from the same place at the same time. After two hours, one car has traveled 30% farther than the other. If one car's speed is 20mph larger than the other car's speed, what are the speeds of the cars? Solve algebraically.

asked by Rosemendz on September 19, 2010
50. physics

find the average of a block being propelled propelled by an elastic band. We know it is uniform acceleration. my attempt on this problem Measure the force applied of elastic band with a newton scale. The more you strecth the farther the distance the block

asked by james on June 12, 2007
51. Social Studies

1. Which group in Spanish colonial society filled high government positions? A. Creoles B. Mulattoes C. Mestizos D. Peninsulares*** 2. Why did France and great Britain clash in the 1700s in North America? A. Great Britain wanted French gold mines*** B.

asked by No name on October 26, 2018
52. Math - Statistics

The increase or decrease in the price of a stock between the beginning and the end of a trading day is assumed to be an equally likely random event. What is the probability that a stock will show a decrease in its closing price on eleven consecutive days?

asked by Derrin on June 19, 2015
53. Physics-Gauss' Law

1. If a surface is a 10 meter by 10 meter plane lying in the y-z plane, what is the vector representing the area of the plane? 2. If a sphere of radius 2 meters is placed in a uniform electric field of 3 N/C, what is the net flux through the sphere? 3.

asked by Bobby on March 23, 2008
54. english

i am writing a literary research paper on the book robinson crusoe. my thesis is In "Robinson Crusoe" Daniel Defoe uses the protagonist to show the sporadic but guiding relationship between God and man. I am having trouble coming up with a title. So far I

asked by hannah on November 15, 2012
55. CHEMISTRY: HESS'S LAW need help!

I'm just overly confused on how to begin this especially with the fractions... please show step by step if you could. Quiz very Soon! Example A: H2(g)+1/2 O2 (g) ----> H2O(l) ... ΔH= -285.8 kJ N2O5(g) + H2O(l) -----> 2HNO3(l) ΔH= -76.56 kJ 1/2 N2(g) +

asked by Madi on February 28, 2017
56. Chemistry

Describe what hard water is and how a water softening unit works. Provide balanced chemical equations to show how sodium sulphate can remove these ions (Magnesium and Calcium). The first was no problem, but I am having trouble trying to get through the

asked by Hannah on July 17, 2012
57. Math

Roulette is a well known game in which a mechanical device randomly selects one of 38 equally likely numbers. IF a player decides to play by choosing a number, he gains \$35 if his number is selected by the device. If any other number is selceted he loses

asked by Kayla on April 21, 2013
58. Social Studies

Why were many countries still dependent on outside help from other nations, such as the United States, following their independence in the 1800s? A. The colonies were weak, and other nations promised to maintain military bases in their countries in order

asked by Yellowkittycorn on December 12, 2017
59. Calc

A particle moves along the x-axis in such a way that it's position in time t for t is greator or equal to 0 is given by x= 1/3t^3 - 3t^2 +8 A) show that at time t= 0 the particle is moving to the right. B) find all values of t for which the particle is

asked by Nicole on January 25, 2013
60. Calc

A particle moves along the x-axis in such a way that it's position in time t for t is greator or equal to 0 is given by x= 1/3t^3 - 3t^2 +8 A) show that at time t= 0 the particle is moving to the right. B) find all values of t for which the particle is

asked by Aparna on January 27, 2013
61. Physic (concepts-please check my thoughts)

A net torque applied to a rigid object always tends to produce? a)translational acceleration b) rotational equilibrium c) rotational acceleration d) rotational inertia e) none of these work (c) Torque produces torsion and tends to produce rotation. The net

asked by Diane on December 10, 2006
62. Math

Triangle with vertices: D(-18,12) E(-6,-12) F(12,6) Show that the right bisectors of the sides of triangleDEF all intersect at point C(-4,4), the circumcentre of the triangle. -I found the midpoint of DF then the slope of the midpoint and point E, then

asked by Anonymous on October 14, 2012
63. math- precalculus

I've attempted this problem a few times but I can't get the right answer. Can someone show me how I can do it? A ship leaves the port of Miami with a bearing of 100 degrees and a speed of 15 knots. After 1 hour, the ship turns 90 degrees toward the south.

asked by jared on March 21, 2009
64. American Government

1) Why are independent regulatory commissions considered quasi-legislative? A) They are part of the legislative branch B) The rules and regulations they make have the force of law** C) They are independent of the executive branch but not the legislative

asked by Juliet on November 17, 2016
65. World History

I can't find any info in regards to creation, expansion, and interaction of economic systems in central Africa during the time span: 600-1450. I've tried many resources and I can't find any info on agricultural and pastoral production, trade and commerce,

asked by Anonymous on November 12, 2007
66. MATH!!

Joe and Susan invested \$1500 at Bank of America in 2000, at 4% compounded quarterly. In the year 2005 they moved to another city and took the total money from their investment added \$500 and invested in at Bank Bravo, at 5% compounded quarterly. a) What is

asked by Anna on November 24, 2014
67. Chemistry

Here's a molar heat problem I just have one question on. How much heat will be transferred if 2 moles of hydrogen reacts with excess oxygen according to the reaction below? 2H2 + O2 yields 2H20 + 572 kJ The answer according to my answer key is 2 mole H2 x

asked by Tabetha on May 18, 2009
68. ENG 098

Can you convince people NOT to eat Oreos? Think of a famous person like an athlete, an actor, politician, or talk show hosts. Write two paragraphs: one to convince this person to purchase OREOS and another to convince this person not to purchase OREOS. You

asked by Serria on April 27, 2014
69. Biology

In a certain species of rabbit, black fur is dominant to white fur. A male rabbit with black fur that is a heterozygote is crossed with a female rabbit with black fur, which is also a heterozygote. Using a Punnett square, show what the genotypes and

asked by Sam on March 5, 2019
70. Child Developmental

Which of the following statements is TRUE? a.Younger children are as likely as older children to remind themselves that they need to pay attention. b.Younger children know fewer attentional "tricks of the trade" than older children. c.Younger and older

asked by Woody on October 2, 2015
71. Science

A car starts from rest and attains a velocity of 40 metres per second in 20 seconds. it maintains this velocity for 30 seconds and then comes to rest in 25 seconds. 1. sketch the velocity time graph for the motion. 2. Calculate the acceleration of the

asked by Clinton Darlington Yartey on November 1, 2016
72. physics

Three forces are applied to an object. Force 1 has a magnitude of 22.0 newtons (22.0 N) and is directed 30.0° to the left of the +y axis. Force 2 has a magnitude of 15.0 N and points along the +x axis. What must be the magnitude and direction (specified

asked by emilee on January 28, 2010
73. English

Identify the main conflict from "the fall from the house of usher " and show what it reveals about the story's protagonist . I have studied this story and I'm not able to find one main conflict, I have found a couple but none add up to the point of what it

asked by Michele on September 20, 2016
74. Chemistry

The first excited state of the hydrogen atom is separated from the ground state by 10.2 eV. (a) At what wavelength does this occur and what is the energy difference in kJ mol-1 between the ground and excited states? Show your working in each case. (b) If

asked by Hobson on March 28, 2010
75. chemistry

why doesnt the radius ratio rule work for TlCl3??? the division would be the radius of the cation / radius of the anion. For Tl3+ and Cl-...88pm/181pm = .49 which would correspond to a 'zinc blende' crystal structure and not a CsCl type crystal as the rest

asked by matthew on March 7, 2015
76. Statistics

A superstore manager wishes to give out a survey to a sample of 25 of its workers. It wants the sample to be a good representation of the workers. The table shows the numbers of workers in each section of the work force: Working tills: 32 Stacking shelves:

asked by David on October 10, 2010
77. Physics

A lump of lead with mass 0.5kg is dropped from height of 20m onto a hard surface it doesn't rebound but remains there at rest for a long period of time. A, find change in heat , change in work, change in internal energy for the lead during this process?

asked by Faf on December 22, 2016
78. Intro to Physics

A sample of an unknown material appears to weigh 295 N in air and 165 N when immersed in alcohol of specific gravity 0.700. (a) What is the volume of the material? ___________m^3 (b) What is the density of the material? ____________ kg/m3 I am getting the

asked by Amy on November 7, 2012
79. Physics

A lump of lead with mass 0.5kg is dropped from height of 20m onto a hard surface it doesn't rebound but remains there at rest for a long period of time. A, find change in heat , change in work, change in internal energy for the lead during this process?

asked by Faf on December 22, 2016
80. Calculus

"The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. Two streetlights are 40m apart and one is twice as strong as the other. Where

asked by Stuck on June 20, 2010
81. Social studies

Over time artwork has the potential to reach a wide variety of audiences. Which is the most accurate definition of audience? A group of people listening to music. Physical evidence of a culture. A group of people with specific beliefs and practices. (This

asked by LOVE on March 9, 2016
82. Pre-Algebra

I need to check my work... estimate the following products or quotients 17 11/12 divided by 6 1/10 The first step I did was convert to improper fraction then I multiplied after changing the reciprical, and then I multiplied the numerators and then

asked by Anonymous on July 31, 2009
83. Physics

A lump of lead with mass 0.5kg is dropped from height of 20m onto a hard surface it doesn't rebound but remains there at rest for a long period of time. A, find change in heat , change in work, change in internal energy for the lead during this process?

asked by Yeabsera on September 29, 2018
84. english

persuasive appeals (A) tone (D) ethos (E) pathos (B) logos (C) A) an appeal to logic B) the emotions that a speaker demonstrates towards his or her subject C) an appeal to the credibility of the speaker D) an appeal to a sense of right and wrong E) devices

asked by kevin on April 8, 2012
85. Math Teacher Certification Exam

Person A has 6.24 and Person B has two cents more than twice Person A. How much money will they have if they combined their money? I had this confusing word problem yesterday on a Teacher Certification Exam for PreK-3 grade. Please help clarify how to set

asked by Miyiah on January 17, 2016
86. Physics

A ball is thrown horizontally from a height of 16.01 m and hits the ground with a speed that is 5.0 times its initial speed. What was the initial speed? This question really boggles my brain. I have no idea how to solve this, given only the height. Could

asked by Lindsay on November 4, 2007
87. Math

To win a trivia game you need atleast 60 points. Each question is worth 4 points. So far , you have earned 24 points. Write and solve an inequality that represents the number of questions you need to answer correctly to win a game.

asked by Aniyah on March 27, 2017
88. math,correction&help

Is this right:if it still needs more can someone help me out what else can i say....thanks why are polynomials important? polynomials are important because the are used to determine and solve the unknowns in equations. Many natural processes can be modeled

asked by jas20 on March 4, 2007
89. Calculus

Hi there I am having some troubles trying to do my calculus homework and I really need help trying to do this problem from my homework: Set up the problem and do not solve: The mass of the solid bounded by the surfaces 2x^2 + 2y^2= 9, z=0, z=3 with density

asked by shylo on December 3, 2009
90. Algebra

kaylin throws two dice. the difference in face value between the two dice is three, and the product of the numbers thrown is equal to twice the sum of two numbers. Write and solve an algebraic equation that finds the numbers kaylin threw.

asked by JD on May 3, 2012
91. .Chemistry Help please?

This type of question come in our exams usually that. If the Reaction P+Q → R + S is described as being of zero order with respect to P, it means that. Answer: THE RATE OF REACTION IS INDEPENDENT OF THE CONCENTRATION OF P. I want to ask that, what is

asked by Shahab Mirza on October 3, 2014
92. math

After making a deposit, Puja had \$264 in her savings account. She noticed that if she added \$26 to the amount originally in the account and doubled the sum, she would get the new amount. How much did she originally have int he account? **Write an equation

asked by kimie on November 11, 2015
93. Math (integrals) (Substitution)

I am given an integral to solve with given substitution values. I got an answer, but I'm not quite sure if it's correct as an online integral calculator gave a different answer. ∫ x sqrt(4-x) dx Given that u = 4-x . In this case, x = 4 - u du = -dx Now..

asked by Ray on May 5, 2017
94. Physics

Can anyone help with which formula I should use to solve this: During a head on car crash, the car is designed to slow down as its front end crumples. If a person can survive an acceleration of -33 m/s how far must the front end crumple if the car was

asked by Lynn on June 17, 2013
95. Physics

You are pulling your little sister on her sled across an icy (frictionless) surface. When you exert a constant horizontal force of 114 N, the sled has an acceleration of 2.3 m/s2 If the sled has a mass of 7.6 kg, what is the mass of your little sister? I

asked by Help Please on October 25, 2012
96. Calculus

A company offers the following schedule of charges: \$30 per thousand for orders of 50,000 or less with the charge per thousand decreased by 37.5 cents for each thousand above 50,000. Find the order which will make the company's receipts a maximum? How do

asked by A company offers the following schedule of charges on December 2, 2012
97. 5th grade math (word problems)

I'm not sure how to solve this problem. I know that i need to divide 36 cookies. But not sure how to figure out the number of groups. Am i using multiples of 4? Marie made 3 dozen cookies. She needs to dived them evenly into groups greater than 4. What are

asked by Alex on March 27, 2013
98. Alg. 2

I know how to graph polynomial functions, but i'm having a hard time getting the second point on this one. f(x)=x(x-1)(x+2)(x+2). I graphed my zeros and made the right arrow go up and the left arrow go down. I plotted my first point by pluggin in -1. My

asked by Miley on February 13, 2008
99. maths

solve the word problem (rates per kg) 1) Mary buys 7 kg peaches,and 5 kg bananas . what is the totala cost? 2)Sarah buys 1kg apple for herself and another 1 kg grapes for her brother . she also buys 2 kg peaches . what is the total cost?

asked by Anonymous on July 30, 2012