# 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 631
1. ## Vectors

A triangle has vertices A(2,3,7), B(0,-3,4) and C(5,2,-4) A) determine the largest angle in the traingle b) determine the area of of the triangle pls tell me how to solve the problem

asked by Marie on May 14, 2010
2. ## Trig

Linear and angular speed Find w for each of the following: 1. the minute hand of a clock 2. the second hand of a clock The answer to #1 should be pi/30, but I do not understand how to solve these.

asked by Laken on November 2, 2009
3. ## Calculus

integral of cscx^(2/3)(cot^3)x i know that cot^2x is csc^2(x)-1, but i just don't understand how to solve the cscx^(2/3), any help? i also know that its trig integrals/substitution...

asked by Brandon on June 10, 2012
4. ## math

directions solve the multiplication/division puzzle. fill in the blanks. x,/ 40 600 8 ______ ______ 7 _______ _______

asked by laken on March 29, 2011
5. ## Math-Limits

How do we evaluate limit of, lim x-> 0 [ln(x+1)/( (2^x) - 1)] I tried using the substitution x+1 = e^k , when x tends to 0 so does k, which gave out, lim k->0 [ k/((2^((e^k) - 1)) -1 ) ] which I simplified into( for the ease of use let e^k =a) lim k->0

asked by Ashley on May 12, 2018
6. ## math

Three consecutive even numbers have a sum between 84 and 96. a. Write an inequality to find the three numbers. Let n represent the smallest even number. b. Solve the inequality

asked by Emalee on October 13, 2010
7. ## Math

Use place value to solve. There are 75 children in the concert. there are 8 boxes of song books. there are 10 books in each box.Is there a book for each child in the concert? How do you know?

asked by cam on August 18, 2009
8. ## Math

Solve each equation. Write each equation in simplest form. Start Fraction 7 x over 8 End Fraction = 21 A. 24 B. 18.375 C. 1.857 D. 19

asked by Anonymous on December 13, 2018
9. ## Statistics

Need help! A normal distribution with a mean of 20 and a standard deviation of 2 is evaluated to solve a business problem. What is the probability that the value in the population is between 20 and 30? What is the probability that any value in the

asked by Student on August 21, 2008
10. ## Algebra

The formula for the volume of a cylinder is: V=πr^2*h If the volume is 432 cubic inches and the height is 8 inches, solve for the length of the radius.

asked by Nancy on April 29, 2012
11. ## math

write a word problem involving the number of pages in a book. then write the numerical expression that you would need to use to solve your problem.

asked by michelle on January 26, 2009
12. ## Statistics

X 0 1 2 3 4 5 6 7 8 P(x) 0.05 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.05 =As the manager you check the cashier ( to see if you need to open a new cashier line). What is the probability that you find exactly 2 people waiting in line? please need to know how to solve

asked by Larry on June 17, 2015
13. ## Math

a frame is made from a 28 inch length of trim and surrounds a 48 square inch picture. solve for the dimensions of the picture

asked by Hailey on March 15, 2011

The following function is one-to-one; find its inverse f(x)=x^3+5 I know that the first step would be to set y = to x so I did y=x^3+5 Then you swap x with y so x=y^3+5. Then you solve for y and this is where I think i messed up. I did y^3=x-5 = y=x^3-5

asked by Hannah on November 3, 2010
15. ## Calculus

Solve & plot a graph for the following: F(X)=cos(X)-cos to second power X for the interval negative pi greater than or equal to X less than or equal to positive pi

asked by Alex on November 7, 2010
16. ## Math- CAN SOMEONE PLEASE CHECK MY WORK?

7x+5y=-26 x=28-6y solve using substitution okay so then 196-42y+5y=-26 then combined like terms so 196+37y=-26 37y=-222 y=-6 is this part correct?

asked by KiKi on March 28, 2010

Solve & plot a graph for the following: F(X)=cos(X)-cos to second power X for the interval negative pi greater than or equal to X less than or equal to positive pi

asked by Alex on November 6, 2010
18. ## Math

How do I solve this? (2x^1/2) * (6x^2 - x^1/2) Here it is in words to make the equation clearer (two x to the one half power) multiplied by (6x squared minus x to the one half power)

asked by Jackie on April 22, 2008
19. ## Chemistry

Why do we need to use amount in moles to solve stoichiometry problems? Why can't I just convert from mass to mass? I'm not sure how to answer. I think I know the answer and just can't formulate it into words.

asked by Ana on March 4, 2010
20. ## math

2x+3y=6 (solve for x) 2x+3y=6 Get unknown on one side and everything else on the other side. To do this we ned to move 3y. How to do that? Subtract 3y from both sides. 2x+3y-3y = 6-3y combine terms. 2x = 6-3y Now divide both sides by 2 2x/2 = (6-3y)/2

asked by cheryl on March 17, 2007
21. ## MATH

Solve the following equations for x where 0 ≤ x < 2π. tan(x)sin(2x) = √3 sin (x) and cos(2x)−cos(x) = −sin2(x)+1/4  Stuck on these particular types. Have no idea how to start.

asked by Anonymous on October 7, 2014
22. ## Algebra

A 3lb puppy is gaining weight at a rate of 3/4 lb per week. When will the puppy's weight exceed 22 1/2 pounds? I need help setting this up to solve.

asked by Ami on March 30, 2008
23. ## Trigonometry

Solve the equation on the interval 0

asked by Sarah on November 28, 2010
24. ## Engineering Economy

Lennon Hearth Products manufactures glass door fireplace screens that have two types of mounting brackets for the frame. And L-shaped bracket is used for relatively small fireplace openings, and a U-shaped bracket is used for all others. The company

asked by Maria on October 1, 2008
25. ## Health

1. The muscular system is essential because it allows our bones to strengthen contract lengthen move 2. which muscle is attached to a bone by tendons? smooth muscle cardiac muscle skeletal muscle involuntary muscle 3. To prevent injury, each time you

asked by help asap on November 13, 2014
26. ## Human Anatomy

Which ones are odd numbered organs in the human excretory system? A. Bladder and urethra B. Ureter, bladder and urethra C. Only the urethra D. Bladder and ureter E. Ureter and urethra

asked by Yonas on August 30, 2018
27. ## algebra 2

1.Which system of equations represents this situation? Let d be the number of toy cars that Dan has and let j be the number of toy cars that Jacob has. 2.how many toy cars does Jacob have?

asked by stephaie on June 15, 2014
28. ## Physics - Rotational Mechanics

The combination of an applied force and a constant frictional force produces a constant total torque of 35.8 Nm on a wheel rotating about a fixed axis. The applied force acts for 5.95 s. During this time the angular speed of the wheel increases from 0 to

asked by John on March 4, 2007
29. ## Physics

Two geological field teams are working in a remote area. A global positioning system (GPS) tracker at their base camp shows the location of the first team as 38 km away, 19deg north of west, and the second team as 28.7 km away, 35deg east of north. When

asked by Sarah on January 29, 2017
30. ## Physics help

Two masses m1 = 2 kg and m2 = 4 kg are connected by a light string. Mass m2 is connected to mass M = 14 kg by a string that passes over an ideal pulley. Determine the following quantities when the system is released from rest. (a) The acceleration of the

asked by arcos15 on October 26, 2012

A 53-N crate is suspended from the left end of a plank. The plank weighs 21 N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.30 m from the left end of the plank. How

asked by Hannah on June 5, 2012
32. ## Math

For xyz manufacturing the fixed costs are \$1200, material and labor costs combined are \$2 per unit, and the demand equation is: p=100/√q What level of output will maximize profit? Show this occurs when marginal revenue equals marginal cost. What is the

asked by Sophie on January 10, 2017
33. ## Math--3 questions. Plz help.

3. Write a numerical expression to represent the following: Margot took \$45 with her to the amusement park. She spent \$20 on lunch and spent \$5 to rent an inner tube. Then find the sum. 45 + (–20) + (–5); 15 45 + (–20) + 5; 30 (–45) + (–20) +

asked by Princess Anna on September 25, 2014
34. ## physical science(chemistry change)

Experiment of tiratic oxilic acid wih mass 4,5g and volume of 25ml,nd concentration of 0,05mol.dm.3 against volume of 14ml and 1,79mol.dm3 sodium hydoxide to determine the concentration of sodium hydroxide,,show all the working,aim,results,observation of

asked by dineo on June 12, 2014
35. ## Chem

3Review example 5.7 and exercise 5.7. Suppose there are 2.00 moles of O2 at 1520 mmHg and 27.0 oC. Rearrange the ideal gas law and use it to determine the volume (L) of the gas. Then, find the density by rearranging the equation P(Mm) = dRT. Show all

asked by Feather on October 11, 2014
36. ## Analytical Chemistry

Show the predominant form of the amino acid tyrosine at pH=13.9 and ph=7.8. Be sure to include the proper number of hydrogens on heteroatoms and the correct formal charges on atoms. I calculated the pka values for COOH (pka=2.41) NH3 (pka=8.67), and OH

asked by Sam on February 26, 2013
37. ## Writing Paper

I am writing a paper on panic disorder. I want my opening paragraph to show an example of a panic attack. Should I start it with- "Imagine taking a walk on a beautiful summer day....then all of a sudden your heart is racing..ect." I am going to talk about

asked by mw on December 29, 2008
38. ## Statistcal Analysis

I need some help with figuring out the ratio-to-moving average. Can someone help me? Here's the problem: Sales of roof material, by quarter, since 1994 for Carolina Home Construction, Inc. are shown below (in \$000): Quarter Year I II III IV 1994 210 180 60

asked by Crystal on January 25, 2014
39. ## calculus

I needed help with this graphing calculator assignment; my sister took my calculator so I don't really have anything to work with, unfortunately. The graphing calculators online are really confusing and seem to require payment to work - so i'm pretty

asked by megan on January 20, 2015
40. ## Chemistry-Acids

Write a balanced chemical equation to show the reaction that occurs when each weak acid reacts with water. (Omit states-of-matter from your answer. Use the lowest possible whole number coefficients.) (b) HCHO2 I've gotten a and c correct, and from that I

asked by Bridget on May 3, 2015
41. ## Social studies-Unit 6 :building on Economics Basic

2. What is one source of revenue for the federal government to pay for public goods and services? A - property taxes B- sales taxes C- income taxes D- excise taxes I think it's c ! 3. What is one the things the federal reserve system does? A- set income

asked by Waves wit da hoodie on May 25, 2017
42. ## physics

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 10 on September 11, 2014
43. ## math

Bernie put in a garden in her back yard. The garden has a perimeter of 272 feet. She wants to know the total surface area of the garden and all she knows is the perimeter and that the width is 20% or (1/5) of the length. (Remember 20% and the fraction 1/5

asked by jessica on December 9, 2012
44. ## Chemistry2

WO3 (s) + 3 H2 (g) -> W (s) + 3 H20 (g) Tungsten is obtained commercially by the reduction of WO3 with hydrogen according to the equation above. The following data related to this reaction are available. DeltaH(kilojoules/mole) for WO3 is -839.5. DeltaH

asked by Jeffery on November 30, 2010
45. ## Government

Which is a more stable governmental system? Authoritarian or Democratic? I know democratizing countries can be more unstable. However, authoritarian countries like China and Russia are becoming more centralized and are limiting civil liberties in their

asked by Lisa on February 10, 2017
46. ## Chemistry

250cm3 of 0.400moldm-3 NaOH and 250cm3 of 0.400moldm-3 HCl is allowed to react in a calorie meter. If the initial temperature of the system is 17.05 degree C and the final temperature is 19.55 degree C,Find the enthalpy of neutralization for the reaction.

asked by Anonymous on February 20, 2013
47. ## Physics!

The figure shows a uniform disk with a circular hole cut out of it. The disk has a radius of 4.00 m. The hole's center is at 2.00 m, and its radius is 1.00 m. What is the x-coordinate of the center of gravity of the system? The center of the disk is (0,0)

asked by Chris on June 10, 2012
48. ## Physics 1

Three charges are fixed to an xy coordinate system. A charge of +16C is on the y axis at y = +3.1 m. A charge of -16C is at the origin. Lastly, a charge of +55C is on the x axis at x = +3.1 m. Determine (a) the magnitude and (b) direction of the net

asked by Beth on June 9, 2012
49. ## Finance

A manufacturing company is thinking of launching a new product. The company expects to sell \$950,000 of the new product in the first year and \$1,500,000 each year thereafter. Direct costs including labor and materials will be 45% of sales. Indirect

asked by Jasmine on December 3, 2014
50. ## critical cognition

Can someone help me evaluate this hypotheses? Evaluate the following hypothese using the five criteria ( The Scientific Method ) for a good scientific explanation. If the hypothesis is inadequate, formulate a new hypotheses and discuss why it is better. A.

asked by rita on March 24, 2011
51. ## llinear programming

Mountain Laurel Vineyards produces three kinds of wineMountain Blanc, Mountain Red, and Mountain Blush. The company has 17 tons of grapes available to produce wine this season. Acask of Blanc requires 0.21 tons of grapes, a cask of Red requires 0.24 tons,

asked by Anonymous on August 21, 2015
52. ## Algebra

You want to purchase at least 10 tickets to a baseball game, but can spend at most \$200. Lower level tickets &8 each, while upper level tickets cost \$5. Write and graph a system of inequalities to represent the situation. Give two possible combinations of

asked by Carla on February 26, 2017
53. ## Physics

A 1100- kg car collides with a 1400- kg car that was initially at rest at the origin of an x-y coordinate system. After the collision, the lighter car moves at 20.0 km/h in a direction of 25 o with respect to the positive x axis. The heavier car moves at

asked by Thomas on April 16, 2015
54. ## science

1. The process in which the chromosomes in sex cells are reproduced by half is called _____________. 2. A white mouse is crossed with a black mouse. all of the offspring were grey. The genes for fur color in mice show _________. 3. Genes are specific

asked by dani on October 22, 2014
55. ## enlish

why do authors use rhetorical devices in essays? a. to simplify the meaning of the main idea b. to increase the credibility of the essay c. to evoke a personal response from readers d. to show their skill as diverse writers e. to compare two or more essays

asked by catie on March 9, 2017
56. ## CUC

1. A rocket was found to be 150m when measured on earth.It then leaves and move at a constant velocity of 2 x 10m/s. What is its new length? 2. Two spaceships A and B are moving in opposite directions, A with a speed of 0.9c while B with a speed of 6c.

asked by Theresa on May 26, 2012
57. ## social studies

The number of multiple births (twins, triplets, etc.) has grown rapidly in the United States since 1980. The main reason for this increase is that: A. studies show that people are having more frequent intercourse. B. less frequent intercourse has resulted

asked by phia on September 28, 2012
58. ## Calculus

Help checking my work please! The region R is a rectangle with vertices P (a,ln a), Q (a, 0), S (3, 0), and T (3, ln a), where 1 < a < 3 (graph: gyazo.com/9e52cd3cd10fad297232efadb9f94d87) A. Write an expression that gives the area of the rectangle as a

asked by Josh on April 23, 2019
59. ## Math

I need help with this questions. a). An overhead garage door has two springs, one on each side of the door. A force of 15 pounds is required to stretch each spring 1 foot. Because of a pulley system, the springs stretch only one-half the distance the door

asked by Danielle on April 1, 2008
60. ## trigonometry

Given that tan A = 2 tan B (B is the symbol for Beta) show that tan (A-B) = sin 2B/3- cos2 Beta.

asked by lindsay on May 1, 2012
61. ## Math

Lily ran 2/3 of a mile.Sara ran 1/3 of a mile.Who ran father.Show how you know

asked by Dorothy on May 7, 2018
62. ## precalculus

Suppose g is an even function and f is any function such that the composition fog is defined. show that fog is an even function

asked by Fatima on September 23, 2012
63. ## Physics repost

Please help!! I have tried everything and is still coming up with and incorrect answer. A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0

asked by Mary on October 10, 2007
64. ## English

Thank you both for helping me. I just wanted to know if the folliwing two words are correct:"them" and "alerts". 1) Go through security and show your passport.Put your hand luggage and any metal object in a basket for them (?) to be scanned. 2) Then walk

asked by Henry2 on October 3, 2011
65. ## Student teacher needs your help

Hello, I am planning to teach my 5th grade class how to write a persuasive letter to the President of the United States. However, I need to show them a few examples of how other students wrote their persuasive letters about particular issues. Where online

asked by Thea on November 27, 2008
66. ## Algebra 1

I'm having a hard time understanding distance rate and time word problems, and my teacher doesn't really make things clear. I don't ask questions, because I'm busy trying to keep up with writing notes. Can someone possibly give me an example on a distance

asked by Teto on May 15, 2011
67. ## Calulus

Hi there I need help with one of the problem from my homework package. This week for my calculus class, we were learning how to do partial derivative and finding the tangent of the plane. So I do not know how to approach this problem. Please help me by how

asked by shylo on October 25, 2009
68. ## physics

Jimmy has caught two fish in Yellow Creek. He has tied the line holding the 3.40 kg steelhead trout to the tail of the 2.29 kg carp. To show the fish to a friend, he lifts upward on the carp with a force of 75.3 N. What is the tension of the rope

asked by Anonymous on September 26, 2009
69. ## Physics

Jimmy has caught two fish in Yellow Creek. He has tied the line holding the 4.30 kg steelhead trout to the tail of the 1.39 kg carp. To show the fish to a friend, he lifts upward on the carp with a force of 87.7 N. What is the tension of the rope

asked by Lucy on October 25, 2008
70. ## physics

How many grams of carbohydrate does a person of mass 75 kg need to metabolize to climb five flights of stairs (15 m height increase)? Each gram of carbohydrate provides 17.6 kJ of energy. Assume 10.0% efficiency—that is, 10.0% of the available chemical

asked by Nasir on June 8, 2012
71. ## physics

A 100-g toy car is propelled by a compressed spring that starts it moving. The car follows the curved track Show that the final speed of the toy car is 0.687 m/s if its initial speed is 2.00 m/s and it coasts up the frictionless slope, gaining 0.180 m in

asked by effraim on March 25, 2014
72. ## Physics

When a butterfly lands 12 cm from a concave mirror, it's image is 18 cm behind the mirror. Find the focal length 1/f=(1/do)-(1/di) 1/f=(1/12)-(1/18) 1/f=0.0833-0.0555 1/f=0.0277 f=36 I'm pretty confident w/ my math but as I understood, it's do-di if it's

asked by Kayla on June 17, 2017

problem:suppose a bacterium reproduces by binary fission every 20 minutes.the new cells survive and reproduce at the same rate. this graph shows how the bacterial population would grow from a single bacterium. use the graph below to show your results up to

asked by christopher crawford on March 6, 2009
74. ## English

(please help) I need help with my English assignment ASAP. I need to know the meaning of Impetus? These are the exact words. Brief summary of the impetus behind your scenario. Be clear to show a clear link to the chosen topic. I do not understand the

asked by Victorine on June 15, 2011
75. ## computers

how do u erase the history from you computer for good places you've been on the internet? yea but i mean in general also for the internet, there is a green arrow going around a clock on a buttonbeside the favourites button. click it. now go to the today

asked by TIFFANY on February 19, 2007
76. ## Physics

Given Two parallel plate capacitors with a seperation d(metres) in free space connected to a dc supply of volts,v. A dielectric material of thickness b(metres) is inserted between the plates so that a distance (d-b)m remains without dielectric. Show that

asked by Joel on September 7, 2016
77. ## math

5 people measured a metal bar using the same measuing instrument,but each read the scale to a different level of accuracy.their 5 answers are show below.4 of them are correct(to the chosen level of accuracy),but one is not.which is the odd one out?1)244mm

asked by sarah on July 20, 2013
78. ## English

from “Harriet Tubman: Conductor on the Underground Railroad”by Ann Petry 1 That first winter in St. Catharines was a terrible one. Canada was a strange frozen land, snow everywhere, ice everywhere, and a bone-biting cold the like of which none of them

asked by Anonymous on December 17, 2018
79. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #1: A skier with a mass of 60.0 kg is standing at the top

asked by Anna on March 7, 2013

A rectangular block of wood is 40cm wide, 60cm long and 30cm deep. If its relative density is 0.7 and it floats with its 30cm side verticle, determine: (a)the length of the block above the water surface and (b)the minimum force required to completely

asked by Momito on April 6, 2012
81. ## English

I forgot to include the following sentences. Thankk you. 1) You changed very little from the notes I gave you on photocopy. You can’t include everything. Select the information you really need to answer the questions and try not to exceed the ten lines.

asked by Henry1 on April 29, 2011
82. ## using the geometric-programing method of constrain

the seasonal operating cost in dollars per square meter of grain bed for such a dryer consists of the cost of heating the air. heating cost=0,002Q(delta T) and blower operating cost Blower cost=2.6^(10^-9)Q^3 where Q= air quantity deliverd through the bed

asked by Alicia on December 8, 2010
83. ## math

the seasonal operating cost in dollars per square meter of grain bed for such a dryer consists of the cost of heating the air. heating cost=0,002Q(delta T) and blower operating cost Blower cost=2.6^(10^-9)Q^3 where Q= air quantity deliverd through the bed

asked by Alicia on December 7, 2010
84. ## algebra

. On the reality TV show Last Man Standing, a package is thrown from a plane to the ocean below. The contestants must swim to the package to receive the “free pass” located inside the package. The path that the package follows can be modelled by the

asked by k on July 11, 2016
85. ## Physics - solar power in space

Hi, this requires some basic knowledge of astrophysics. I missed last lecture that covered this, so though I'd prefer thorough solutions to these problems, I'd appreciate it even if you could tell me which formulas to use to solve each part of the problem.

asked by Mark on March 4, 2009
86. ## Statistics

Prospective Cohort Study The following tables show the crude and sex-specific results from a Prospective Cohort Study that examines the association between a binary exposure (E) and the development of a disease (D) during 20 years of follow-up. Use these

asked by netspirit on January 15, 2013
87. ## Physics

A baggage carousel at an airport is rotating with an angular speed of 0.397 rad/s when the baggage begins to be loaded onto it. The moment of inertia of the carousel is 2440 kg·m2. Ten pieces of baggage with an average mass of 16.5 kg each are dropped

asked by Ben on January 27, 2014
88. ## Physics

A baggage carousel at an airport is rotating with an angular speed of 0.397 rad/s when the baggage begins to be loaded onto it. The moment of inertia of the carousel is 2440 kg·m2. Ten pieces of baggage with an average mass of 16.5 kg each are dropped

asked by Sam on January 27, 2014
89. ## Physics help!

How far from the center of the Earth (in km) is the center of mass of the Earth + satellite system if the satellite has a mass of 6560 kg and is in orbit 46200 km above the surface of the Earth. The mass of the Earth is 5.98 * 10^24 kg and the radius of

asked by Me on November 14, 2011

How far from the center of the Earth (in km) is the center of mass of the Earth + satellite system if the satellite has a mass of 6560 kg and is in orbit 46200 km above the surface of the Earth. The mass of the Earth is 5.98 * 10^24 kg and the radius of

asked by Me on November 14, 2011
91. ## Chemistry

Which of the four factors affecting reaction rate is most important in each example below? Choose from among concentration, temperature, surface area, and catalyst. A? Extra dish soap is added to help cut the grease when washing a frying pan. =

asked by Derrick on July 18, 2010
92. ## Math

Need help solving this problem. If there's an equation at the end, need help in how to solve that also. Compounded interest problem. Principal \$825. Rate 4%. Compounded Annually. Time 10 years.

asked by J on February 9, 2011
93. ## chemistry

sodium is a very good conductor of electricity and scientists are working on ways of using it to make electrical wires. what are the main problems the scientists must try to solve before sodium can be used in this way?

asked by anonymous on October 12, 2010
94. ## math

**Write an equation and solve: A diver begins at sea level and descends vertically at a rate of 2 1/2 feet per second. How long does the diver take to reach -15.6 feet? THANK YOU!!!!

asked by kimie on November 4, 2015
95. ## math (urgent )

13.875-0.1875(56.375)/8-2 (1/8+27.125/300.875 the answer is 1.1908 but when i calculate use calculator i cant get the answer.we need solve value in the bracket first then multipe by first value or how ? pls

asked by fizz on May 14, 2014
96. ## Math

Solve the following problem. The owner of a toy store is taking inventory of bicycles and tricycles in an unusual way. He said he counted 50 wheels and 40 pedals.How many bicycles and how many tricycles did he have?

asked by Alicia on February 16, 2012
97. ## math

How do I set-up/solve this problem? Please help me. The half-life of the radioactive isotope gallium-70 is 20 minutes. If the initial amount of gallium-70 is 25 milligrams, when will 10 milligrams be left?

asked by Amy on February 17, 2011
98. ## geometry

Angles 1 and 7 are alternate exterior angles of a transversal cutting two parallel lines. If m(Ú1)=4x+10 and m(Ú7)=6x+4, what are the measures of angles 1 and 7? Give a property of angles that helped you solve the problem.

asked by nicole on February 10, 2010
99. ## Physics

A fully charged 90-µF capacitor is discharged through a 60-Ω resistor. How long will it take for the capacitor to lose 80% of its initial energy? I know energy is given by E(t)=q(t)^2, but beyond that I really don't know how to solve this. Any

asked by Bruce on October 24, 2012
100. ## Alg I

Please explain how to solve: Laura can pressure wash her driveway at an average rate of 15 square feet per minute. Which is closest to this rate in square yards per second? A. 0.35 B. 0.24 C. 0.03 D. 0.01

asked by Jane on June 3, 2012