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 738
1. Math (Calculus)

A spherical snowball is melting in such a way that its diameter is decreasing at rate of 0.3 cm/min. At what rate is the volume of the snowball decreasing when the diameter is 10 cm. Can someone help & explain how to solve this question? Please.

asked by Alex on November 29, 2012
2. algebra/math

Rico's collection of quaters and dimes contains \$32.85. There are 171 coins in all How many quarters and how many dimes are in Rico's collection? i solve these with 2 equation. would they be: q + d = 171 25q + 10d = 32.85 help me please.

asked by shhtacy on February 17, 2009
3. linear algebra

Solve using the concept of rank. Is S={−16 −7 −21,2 1 3, 21 9 2} a linearly independent set of vectors in R3? So I know how to find out if this set is linearly indep. But, I don't know how to use row rank to find this out..

asked by sam on March 23, 2015

Rico's collection of quaters and dimes contains \$32.85. There are 171 coins in all How many quarters and how many dimes are in Rico's collection? i solve these with 2 equation. would they be: q + d = 171 25q + 10d = 32.85 help me please.

asked by shhtacy on February 17, 2009
5. English

I just need someone to please check my answers. I'm not so good with English. My answers are marked with a

asked by Jean C. on January 25, 2017
6. Algebra II

Can you please explain what formula I need to do to solve the following problem: If 3 laps = 5/8 mile, how many laps needs to be completed to run 3 miles? Don't look for "formulas" to do these kind of questions, use ratios, one of the most powerful tools

asked by Sami on August 15, 2007
7. Chemistry: Dr. Bob, can you check my work?

In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a

asked by Zachary on November 15, 2012
8. Home Economics

1. The document a caterer uses to stipulate the terms, conditions, and contents of the services he or she will provide each client is called the A. client agreement. B. menu. C. press release. D. brochure. 2. One of the keys to running a lucrative catering

asked by JoSue on November 13, 2008
9. Managerial Economics

Suppose your company is considering three health insurance policies. The first policy requires no tests and covers all preexisting illnesses. The second policy requires that all covered employees test negative for the HIV virus. The third policy does not

asked by Jutee on May 20, 2015
10. chemistry

The reaction of the ferric ions with isocyanate ions is an exothermic reaction. In what direction would you expect the equilibrium to move if the solution temperature is raised? Would the color of the reaction intensify? Explain. What would happen if you

asked by Anonymous on August 15, 2010
11. Chemistry

Calculate the molarity of a solution if 300.0 mL of it contains 16.8 g of KNO3. [Use formula weight: KNO3, 101.11 amu]....Question do I need to convert 300.0 mL to L? My initial set up looks like this: (16.8g/101.11amu)/300.0 mL my answer turns out to be

asked by Chemistry Chick on October 29, 2011
12. chemistry help!!

A beaker with 195 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.20 mL of a 0.260 it M HCl solution to the beaker. How much will the pH

asked by DrFunk on July 13, 2009
13. chemistry

One handbook lists a value pKb= 9.5 for of quinoline,C9H7N , a weak base used as a preservative for anatomical specimens and to make dyes. Another handbook lists the solubility of quinoline in water at 25degree celsius as 0.6g/100mL. calculate the pH of a

asked by chips ahoy on April 11, 2011
14. Chemistry

A beaker with 150 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.90 mL of a 0.480 M HCl solution to the beaker. How much will the pH change?

asked by Anonymous on October 6, 2009
15. Chemistry

A beaker with 150 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 5.60 mL of a 0.280 M HCl solution to the beaker. How much will the pH change?

asked by Saira on July 9, 2009
16. Chemistry

3. The solubility of BaSO4 at 25C is 9.04 mg/L. Based on this, how many grams and moles of BaSO4 remained dissolved in the 100 mL of solution? What percent of your yield does this represent? 2. The precipitate is washed with warm water not cold, why is

asked by emman on October 19, 2011
17. Physics

A 2 kg pendulum bob is hanging from a 30 cm long piece of string. If the pendulum bob is allowed to move in circular motion in a horizontal plane, determine the tension in the string if the angle the string makes with the vertical is 37 degrees. Need Step

asked by Trevor on November 18, 2007
18. Science

What type of signal is measured in a sonar system to determine the depth of the ocean? A. absorption of sound waves by underwater features B. reflection of sound waves by underwater features C. absorption of electromagnet waves by underwater features D.

asked by Dayana on March 22, 2012
19. Science

The atmospheres of the planets in our solar system differ in their physical compositions. Which planet would you expect to have the thickest atmosphere? a planet with a hot atmosphere and strong gravity a planet with a cold atmosphere and strong gravity a

asked by Nour on July 30, 2015
20. MAth

help me please Many people are interested in losing weight through exercise. An important fact to consider is that a person needs to burn off 3,500 calories more than he or she takes in to lose 1 pound, according to the American Dietetic Association. The

asked by dawn on July 2, 2008
21. Algebra 1

I have this extra credit assignment for Algebra 1. It's due tomorrow and I really need help on this. I had a slope of 0.222 for one line and 0.081 for the other line. (y=0.081 * x + 215.378) (y=0.222 * x - 43.829) My intersection point is about 1800,320. I

asked by Kate_Mack_Son on February 16, 2017
22. Anonymous

Maya is going to rent a truck for one day. There are two companies she can choose from, and they have the following prices. Company A charges and allows unlimited mileage. Company B has an initial fee of and charges an additional for every mile driven. For

asked by Anonymous on March 17, 2011
23. Math

Jake serves a volleyball with an initial velocity of 32 feet per second from 4.5 feet above the ground at an angle 0f 35 degrees. a) Write parametric equations to model the situation. h(t) = -16t^2 + 32t + 4.5 --------------------------------------- b) How

asked by Alexis on March 3, 2014
24. Physics

A bat flying in a cave emits a sound and receives its echo 0.9 s later. How far away is the cave wall? The distance there and back is given by distance=velocitySound*time We are not given velocity to solve for the problem. The velocity of sound is

asked by Allie on November 5, 2006
25. chem help

a scuba diver breathing normal air descends 100m of depth, where the total pressure is 11 atm. What is the partial pressure of oxygen that the diver experiences at this depth? Can someone help out on this question? Make a ratio: 11atm/1atm= P/partial

asked by david on March 19, 2007
26. Algebra II

Ravi is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges \$75 and allows unlimited mileage. Company B has an initial fee of \$55 and charges an additional \$0.80 for every

asked by Bryan on April 2, 2014
27. algebra

Ashley is going to rent a truck for one day. There are two companies she can choose from, and they have the following prices. Company A charges \$95 and allows unlimited mileage. Company B has an initial fee of \$75 and charges an additional \$0.80 for every

asked by heather on December 21, 2016
28. Microeconomics

Consider the market for taxi rides in a particular metropolitan area. a) Suppose that, when the price per mile increases by 40%, total miles demanded falls by 30%. Solve for the price elasticity of demand. b) Is the demand for taxi rides elastic or

asked by Kelis on March 27, 2010
29. General Chemistry II

At a pressure of 1ATM, _____ KJ of heat is needed to vaporize a 32.3 g sample of liquid ethanol at its normal boiling point of 78.4 C. Boiling point (78.4 C), specific heat (2.46 J/g C), and Hvap(78.4 C)=38.6 KJ/mol are provided. Please include how to

asked by Jessica on January 27, 2018
30. College Chemistry

Sulfur trioxide is made from the reaction of sulfur dioxide and oxygen. how many grams of SO3 can be made from the reaction of 1.91g SO2 with 1.29g O2? 2 SO2(g) + O2(g)---> 2SO3(g) a) 2.39g b) 3.20g c) 3.23g d) 4.77g e) 6.46g How would i solve this

asked by James on May 4, 2010
31. Chemistry

Hey can anyone help me solve these questions 1. Balance K2Cr2O7 +H2C2O42H2O --> K[Cr(CrC2O4)2(H2O)2]2H2O +CO2+ H2O 2. Calculate the theoretical yield of the reaction mentioned above 3.What is the theoretical percentage by weight of Cr in the reaction

asked by Lisa on January 17, 2014
32. Physics

As two trains move along a track, their conductors suddenly notice that they are headed toward each other. The figure below gives their velocities v as functions of time t as the conductors slow the trains. The slowing processes begin when the trains are

asked by Natalie on September 7, 2011
33. Algebra

A ball is thrown upward with an initial velocity of 14 meters per second from a cliff that is high. The height of the ball is given by the quadratic equation where h is in meters and t is the time in seconds since the ball was thrown. Find the time that

asked by Sherry on March 4, 2013
34. chemistry

A rolaids tablet contains calcium carbonate which neutralizes stomach acid. If rolaids tablet neutralizes 42.15 mL of 0.320M hydrochloric acid, how many milligrams of calcium carbonate are in a Rolaids tablet CaCO3 + 2 HCl ------> CaCl2 + H2O + CO2 Pls

asked by monique on November 15, 2011
35. math

Maria gave a store clerk \$10.00 for a purchase that cost \$9.19. Part A What is the total amount of change Maria should have received from the clerk? Part B How would Maria receive her change using the least number of coins possible? Part C Show 1 way Maria

asked by mat on March 11, 2013
36. Math

The laurelwood pta is presenting it's 5th annual talent show and Kate is collected tickets at the door the gym is filled with 215 students and adults. Students tickets are .50 and adults tickets are 2.00. If Kate collected 250.00. How many adults and how

asked by Erin on February 18, 2016
37. AP Physics - collisions?

Two steel balls collide and bounce apart in an isolated system. If the final kinetic energy is less than the initial kinetic energy, what of the following is true? a) Momentum is conserved in this elastic collision incorrect b) Momentum is not conserved in

asked by Anonymous on August 30, 2017
38. Social Studies

In what way did the nation's transportation system help promote economic growth? a)It made it easier for Native Americans and freed African Americans to obtain the same goods as white people, boosting demand b)Because it added costs for delivery of goods,

asked by anonymous101 on January 22, 2018

1. Your personality is: the way you usually think the way you usually act*** both of these neither of these 2. Susana is creating a list of adjectives that usually describe her. She is listing her: personality traits*** personality types career types

asked by Ember Lovet on August 29, 2017
40. Math

1. Use formulas to find the lateral area and surface area of the given prism. Round your nearest answer to the nearest whole number. use the large 19x6 m rectangles on the top and bottom as the bases. Left corner is 2m, bottom length is 19m, and right face

asked by Tim on May 16, 2016
41. Math

i am working with completing the square in parabolas and there's this word problem i just cannot solve..a farmer wants to make a rectangular corral along the side of a large barn and has enough materials for 60m of fencing. Only 3 sides must be fenced,

asked by Callie on December 9, 2008
42. CHEMISTRY

I am struggling with organizing stoichiometry problems; I know how to solve them after they're set up. Here is an example: "An organic compound with a FW of 417 was analyzed for ethoxyl {CH3-CH2O-} groups with the rxn: ROCH2CH3 + HI --> ROH +CH3CH2I

asked by MICOLE on May 16, 2008
43. Chemistry-Repost for DrBob222

The reaction OH- + NH4+ = H20 + NH3 is kinetically first order in both reactants' concentrations. The rate constant is 2e10 1/M s. If 50 ml of .01 M NaOH is mixed with 50 ml of .01 M NH4CL, find the time required for the OH- concentration to reach 1e-4 M.

asked by Anonymous on March 21, 2014
44. Chemistry

Consider the following reaction: 2NiO (s)--> 2Ni(s) + 2O2 (g) If O2 is collected over water at 40.0 C and a total pressure of 752 mmHg, what volume of gas will be collected for the complete reaction of 25.67 g of NiO? I am struggling to set up this

asked by Charlie on December 7, 2009
45. Social Studies

How did changes in society caused by world war 2 affect blacks? A. Public schools were desegregated during the 1940s B. Black soldiers returning from war no longer encountered discrimination C. For the first time blacks were needed for factory work*** D.

asked by Anonymous on May 1, 2015
46. ART

Select one artwork that expresses a human experience you have encountered in your own life. Human experience, or the human condition, includes birth, death, love, loss, pleasure, pain, hope, frustration, elation, despair, values, and beliefs. Your chosen

asked by Anonymous on August 9, 2009
47. chemistry

what is the molecular formula of oxide of arsenic in its gaseous state (also I need to explain how this formula came about )?? There are two arsenic oxides. One is As2O3 and the other is As2O5. How did that come about? Please clarify. I assume you have

asked by Angelika on February 15, 2007
48. math

An auto manufacturer sends cars from two plants, I and II, to dealerships A and B located in a Midwestern city. Plant I has a total of 28 cars to send, and plant II has 8. Dealer A needs 20 cars, and dealer B needs 16. Transportation costs per car, based

asked by NotGonnaSay on August 21, 2012
49. Physics - work done

A variable force F acts through a displacement d. The magnitude of the force is proportional to the displacement, so F=kd, where k is constant. a) Sketch a graph of this force against position up to position x. b) According to the equation, what is the

asked by Shaila on October 6, 2010
50. College Finance

Aunt Sally's Food Inc. is considering expansion. Sally has paid \$100,000 for a marketing study to assist in the potential valuation. The study indicates that the new product will have sales of \$1,500,000 per year each year for the next 6 years. However,

asked by Marie on May 6, 2010
51. Finance

Aunt Sally's Food Inc. is considering expansion. Sally has paid \$100,000 for a marketing study to assist in the potential valuation. The study indicates that the new product will have sales of \$1,500,000 per year each year for the next 6 years. However,

asked by Marie on May 6, 2010

Imagine that you are a system administrator for a company, and that the company operates from two locations Phoenix and Boston. Phoenix has 350 hosts and Boston has 2100. Given that the following class C IP addresses have been assigned to your company as a

asked by Francesca on September 14, 2011
53. Chemistry Help.......

Which element results if 2protons and 2neutrons with the atomic number 88 and mass number 226? Show workings Help please Since this is not my area of expertise, I searched Google under the key words "atomic number 88" to get these possible sources:

asked by Fraser on March 5, 2007
54. algebra

Beatriz is creating graphs for her city’s Parks Department. Beatriz is trying to persuade the Parks Department to put in more gazebos for shade. For a local park, Beatriz wants to demonstrate the attendance as it changes every week. She also wants to

asked by angelica on October 20, 2013
55. english

Can you check my poem if it has 10 syllables per line and any other mistake? and thank you. You just didn’t know how much I loved you How hard I tried and you still didn’t know How close we were was something oh so true I don’t think it was right for

asked by joseph on April 22, 2012
56. Social studies (Help)

1. What was most dangerous about signing the Declaration of Independence? A. the signers would lose their political positions B. the signers would be trainers, for which they would be hung if captured •• C. the signers would be targets of Loyalists'

asked by Lopez Marcos on September 27, 2016
57. math

in the equation 3y - x=2 what is the slope of the line of this equation? Using the equation y=mx+b you have to solve 3y-x=2 for Y. M stands for slope and Y stands for Y intercept Doing that I get y = 1/3x + 2/3 I hope that's what you are looking for! Put

asked by cindy on January 29, 2007
58. Math

Mrs. Lin brings 6 trays of hamburger buns to the barbecue. 2/3 of the trays have wheat buns. How many of the trays have wheat buns? Draw a diagram to solve the problem.

asked by May on April 25, 2017
59. Math

Mrs. Lin brings 6 trays of hamburger buns to the barbecue. 2/3 of the trays have wheat buns. How many of the trays have wheat buns? Draw a diagram to solve the problem.

asked by Dhivya on April 23, 2019
60. Math Inequalities

-9/8x greater than or equal to -1/16 can someone please check my answer? my answer is x greather than or equal to 1/18 is this correct? if not what is the correct answer and what is the correct way to solve this problem..maybe I missed a step or did not do

asked by Anna on November 5, 2009
61. math

I have trouble solving word problems. Can you help me solve this problem? If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take both of them to paint the house together?

asked by Becky on November 16, 2008
62. math

Julius sold 5x as many computers as Sam sold last year. In total they sold 78 computers. How many computers did Julius sell. **Solve each problem by WRIING and solving the equation.

asked by sheila on November 13, 2013
63. statistics

What SPECIFIC statistical test would be applied to these data collected to answer the following questions? What’s the average amount of pain Mr. Smith reported yesterday? Is there a significant difference in depression levels (using a scale of 0-60)

asked by Mack on October 7, 2011
64. Art... Complementary colors

Hello, In the following question my answer is #1 is that correct? Thank You If you wan to balance complementary colors so that they'll appear static and harmonious, you need to; #1 use the proper proportions of each color. #2 work only with spilt

asked by Mandi on August 18, 2007

While having breakfast with a friend she tells you that her office recently implemented flex-time hours. It has been a positive change at his work place, and you think that it would be great to have this at your office too. You decide to approach your boss

asked by Goody on November 16, 2014
66. Earth space science

I need help with this. the map doesnt show anything and idk how to post the map on here... Match the cities A,B,C, and D with the weather description of the surface model (To the right of each letter) a. city A b. City B c. City C d. City D A. Pressure of

asked by Selena on November 14, 2013
67. integrated science

what is.. the modem system of units used by scientists? what is.. the curved surface of a liquid? what is.. a process used to find the volume of an irregularly shaped object? (1) S. I. (International scientific) (2) meniscus (3) total immersion (liquid

asked by martin on August 7, 2007
68. Chemistry

ELement A has a valence electronic structure of ns2np1. Element B has the valence electronic structure of ns2np5. Oh I meant Would you expect a compound from elements A and B to conduct an electric current in its solid state and why??? I would expect it to

asked by John on April 19, 2007
69. Movie review

I didn't get help so just re-posting. I have to write a review of a film or play I've seen and I chose the movie "Law Abiding Citizen" I need help (the theme isn't really a theme, its the plot but I can't really come up with a theme.) Could this be it? A

asked by Anonymous on November 22, 2009
70. Early Childhood Ed.

I have a question but think I know the right answer. Just need someone to verify. Which is not an example of the typical toddler behavior? 1.toddlers are fairly capble of self-feeding 2.toddlers don't like food mixtures 3.toddlers show decided food

asked by Elaine on April 21, 2007
71. Physics

In a horizontal spring-mass configuration, the position of the 0.52 kg mass is described by [x = (1.09 m) sin(2.70t)] a) What is in meters the amplitude of these oscillations? b) What is in m/s the maximum speed of the mass under these conditions? c) What

asked by Serena on November 12, 2014
72. Math Statistics

Suppose you work for the quality control department at Hewlett Packard. You know that ink jet cartridges are sometimes defective. The current defective rate is 8 cartridges per package of 100 (i.e. 0.08) What is the probability of sampling 12 cartridges

asked by Jaz on June 4, 2018
73. Physics repost

A 2.00 resistor, and a 12.0 resistor are connected in parallel across a 20.0-V battery. What is the current flowing through the 2.00 resistor? A)1.67 A B)1.40 A C)11.6 A D)10.0 A This is all I understand. Can you explain step by step and show how to get

asked by Jon on April 9, 2008
74. maths

Show that the equation (1) divided by (x+1) - (x)divided by (x-2)=0 has no real roots Well, to begin, start with 1/(x+1-x). The x's cancel out because they are opposite signs, so now you have 1/1, or just 1. Then, you are dividing 1 by (x-2). In order for

asked by rochelle on January 28, 2007
75. Psychology

Avis put off writing her term paper until three days before it was due. "It's not that big of a deal. I can whip it out in a couple of hours," she thought. As it turned out, this was not the case. She averaged two hours a night sleep as she struggled to

asked by Angela on May 20, 2013
76. Psychology

Avis put off writing her term paper until three days before it was due. "It's not that big of a deal. I can whip it out in a couple of hours," she thought. As it turned out, this was not the case. She averaged two-hours-a-night sleep as she struggled to

asked by Kasey on November 7, 2011
77. Psychology

Avis put off writing her term paper until three days before it was due. "It's not that big of a deal. I can whip it out in a couple of hours," she thought. As it turned out, this was not the case. She averaged two hours a night sleep as she struggled to

asked by Tobbo on June 5, 2011
78. Psychology

Avis put off writing her term paper until three days before it was due. "It's not that big of a deal. I can whip it out in a couple of hours," she thought. As it turned out, this was not the case. She averaged two hours a night sleep as she struggled to

asked by Nicci on July 25, 2011

CAUSE AND EFFECT A CAUSE TELLS WHY SOMETHING HAPPENED. AN EFFECT IS WHAT HAPPENED. WORDS SUCH AS BECAUSE AND SO ARE CLUES THAT SHOW CAUSE-AND-EFFECT RELATIONSHIPS. SOMETIMES,HOWEVER,CLUE WORDS ARE NOT USED. DIRECTIONS-READ THE STORY.THEN ANSWER THE

asked by dw on March 23, 2012
80. dwyer

how do i start to solve this Harry has a choice of a veggie burge and a regular pizza he can have three toppings his choices are lettuce pickles onions tomatos and sprouts that is five items how many combinations can he have I think i multiply 5 x 3 and

asked by tyler on April 17, 2007
81. Music

Lesson 13: Building Blocks Unit Test CE 2015 Exploring Music I Unit 2: Building Blocks PerformanceCEMusic-Performance I really need help. 1.Which word do the following notes spell? E.G.G A.EGG B.AGE C.FAD D.BED 2.A sharp raises a note by A.a whole step.

82. human anatomy and physiology

4. living organisms require energy to function and this includes each and every one of the trillions of cells that constitute the human body. Define in detail and use diagrams appropriate to show how cells extract, use and store energy including but to

asked by Kristen on August 23, 2005
83. Critical to life is the function of the cell membr

living organisms require energy to function and this includes each and every one of the trillions of cells that constitute the human body. Define in detail and use diagrams appropriate to show how cells extract, use and store energy including but to

asked by Kristen on August 23, 2005
84. English

Are the following sentences possible? Thank you very much. 1) He shot me in the leg. 2) He showed me the way to the supermarket. 3) He likes shooting. 4) He shouted at him. 5) I always show my gift card to the check-out clerk so that I can get a discount

asked by Franco on January 26, 2011
85. human anatomy and physiology

living organisms require energy to function and this includes each and every one of the trillions of cells that constitute the human body. Define in detail and use diagrams appropriate to show how cells extract, use and store energy including but to

asked by Kristen on August 23, 2005
86. physics

A block of mass m1 = 13.5 kg rests on a wedge of angle θ = 27∘ placed over a table.. An inextensible string is attached to Block M1, passes over a frictionless pulley at the top of the wedge, and is then attached to another block of mass M2 = 3 kg. The

asked by ss01 on October 1, 2013
87. Chemistry

If the freezing point of pure toluene is -95.15 oC and its freezing point depression constant is -8.38 oC/molal, what is the freezing point of a solution made by dissolving 39.338g of anthracene (C14H10) in 150.0mL of toluene? (Density of toluene =

88. math

How do I find the y-intercept from a table? I know if the table has the x value as 0, and it gives the y value, then that is the y intercept coordinates. But I'm talking about if it doesn't show a zero value for x. So for example, if my table is something

asked by Carly on October 19, 2017
89. Science

Science project ideas for science fair. I need to prepare a model for science fair. But I need some ideas about the major problems facing today's world. So that I can get idea for improvement in any area and to show this in science fair. Please get me know

asked by Edd on October 21, 2014
90. physics

A fire hose ejects a stream of water at an angle of 37.9 ° above the horizontal. The water leaves the nozzle with a speed of 25.5 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by frost on February 10, 2011
91. celebrating Diversity

Julie has a speech delay and is often shy with other children. The group activities is to A. provide an art activity for Julie and two to three other children. B. provide her with some books to read while you work with the other children. C. let her watch

asked by Amanda on October 22, 2014
92. math

A random group of seniors was selected from a university and asked about their plans for the following year. The school advising office claims that 60% of the students plan to work, 30% of the students plan to continue in school, and 10% of the students

asked by ed on December 16, 2012
93. Math

Can you help me understand this math problem...I could figure it out the long way but I think there is a formula that I can use that I'm not remembering: I have 18 different colors of marbles. I'm going to arrange them in sets of three. I want to do this 6

asked by GwendolynDuncan on August 17, 2010
94. physics

A 14.0 kg cart is moving with a velocity of 7.25 m/s down a level hallway. A constant force of -10.0 N acts on the cart, and its velocity becomes 3.20 m/s. Assume that air resistance is negligible. (a) What is the change in kinetic energy of the cart? (b)

asked by lets go on January 9, 2011
95. Physics

Sit down somewhere where there are lots of people. Now categorize the people according to gender and hair color. Start with the males: Observe at least 20 and keep track of how many have hair that is in one of the following categories: black, brown,

asked by Morgan on March 30, 2018
96. Biology

Has anyone done this experiment before? I need help with the final results. What would happen when I place 2 mL of hydrogen peroxide into 5 test tube, add manganese dioxide powder to the first one, then add sand to the second one, liver to the third one,

asked by Josh on September 26, 2007
97. trig

I'm confused with this concept: Okay, so I have this problem: cos2x( 2 cos+1)= 0 I understand I have to work the problems separately and I get cos x= 2 and cos x= 1/2 Now, what I don't understand is how this connects to pi, radians or the unit circle. If

asked by Anonymous on October 29, 2011
98. physics

A technician wishes to produce the lens +2.00DS/+2.00DC x90 in toric form, in CR39 with a -5.00 base curve. After finishing the toroidal surface with the CR39 tool it is discovered that, in error, they have used a plastics material of refractive index

asked by Can anyone help? on November 27, 2012
99. Algebra

A worker gets 18 dollars per hour for a normal work week of 40 hours and time-and-a-half for overtime. Assuming he works at least 40 hours a week, construct a function describing his weekly paycheck,P, as a function of the number of hours worked, t.

asked by Katie on May 11, 2017
100. Physics

"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. At a height of 16 m, his speed is 5.0 m/s. His mass, including the propulsion unit, has the approximately constant

asked by Kristen on October 21, 2015