# 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

91,330 questions, page 106
1. ## chemistry

SHOW WORK How many moles of helium occupy 26.4 L at a pressure of 103.0 kPa, and 10 degrees Celsius? A.) 0.03 mole B.) 0.86 mole C.) 1.16 mole D.) 32.72 mole

asked by Caitlyn on December 4, 2013
2. ## Math

Verify the identities by transforming the left-hand side into the right-hand side. Show work. (tan^2X)/(1-cos^2x)= sec^2x HELP

asked by Carter on February 26, 2012
3. ## history

Ii need to find an actual newspaper report on Jack the Ripper. we have to show actual article with our work. I have tried to find this and have been unable to do so. Hope you can you help.

asked by frances on December 22, 2008
4. ## math

A scale drawing of a city has a scale of 3 inches : 400 feet. What is the actual length of each foot in the drawing? Show the work.

asked by Alyssa on February 14, 2015
5. ## college algebra-plz help

a circle has the equation 3(x-5)^2_3y^2=12. Find the center and radius and graph the circle. find the intercepts, if any. plz show work

asked by James on December 9, 2012
6. ## Math

Is anyone familiar with base ten? I need to show my work on how I received my answer. Write the numeral in base ten. 200six =532

asked by kevin on March 21, 2010
7. ## maths

Eugene spent half his money in one shop and half of what was left in another shop. He then had€1.25. How much had he in the beginning. I am not sure if I got it right so O got €5.00\€6.25. So please do show your rough work and answer. Thank You! :D

asked by liam on November 9, 2015
8. ## Physic II

Two like charges of the same magnitude are 8.0 mm apart. if the force of repulsion they exert upon each other is 4.0 N, what is the magnitude of each charge? (The constant of proportional for the Coulombic force is 9.0 x 10^9 N.m^2/C^2 ) Please show all

asked by John on January 26, 2014
9. ## Chemistry II

An analgesic mixture is 37.5% aspirin by mass. How many grams of the mixture are needed to provide 325 mg aspirin. Make sure to show your work.

asked by Krista on August 26, 2013
10. ## Math

Two railroad tracks cross each other if the measure of angle 1 is 3 times the measure of angle 2, what are the measures of angles 1,2,3, and 4? Explain and show your work

asked by Riley on January 24, 2016
11. ## algebra 2

You have \$16 to spend at a movie theatre. You spend \$10 for admission. You want to buy soft drinks that cost \$2.50 each, how many can you buy? Show your equation & work. Help!

asked by Johnathan on August 24, 2014
12. ## Math

Two railroad tracks cross each other. If the measure of angle 1 is 3 times the measure of angle 2. What are the measures of angles 1,2,3, and 4? Explain and show your work please.

asked by Nicole on November 12, 2013
13. ## Math

24 m of fencing are available to enclose a play area. what would the maximum area be if the fencing only went on 3 sides because the wall is used as the 4th side. Please show you work

asked by CJ on February 22, 2013
14. ## maths

twenty-seven out of thirty students have a mobile work out the percentage of students who do not have a mobile phone! show each stage of working out? THANKYOU

asked by rose on February 15, 2011
15. ## Chemistry

I have a few question about an equilibrium lab we performed. Approximately .1 g of CoCl2 * 6H2O was mixed with 2 mL of 12 M HCl. The solution turned blue. Then, water was added and stirred into the solution in 2 mL incriments until no further color change

asked by Kim on May 29, 2007
16. ## Chen=mistry

Sodium metal reacts violently with water to form NaOH and release hydrogen gas. Suppose that 3.00 g of Na reacts completely with 3.00 L of water and the final volume of the system is 3 L. What is the molarity M of the NaOH Solution formed by the reaction?

asked by Janet on May 1, 2013
17. ## Chemistry

A solution is prepared using 15.0 mL of 1.0 M HCl and 20.0 mL of 0.5 M HNO3. The final volume of the solution is 1.25 L. What are the [H3O+] and [OH-] in the final solution? What is the pH of the final solution?

asked by Heather on May 22, 2010
18. ## Algebra

1) translate to an algebraic expression: one less than a product of two numbers A: xy-1 2) 12/25 = ? A: ? = .48 3) Find -x when x= -25/41 (this is a fraction) A: -x = 41/25 4) Use a commutative law to find an equivalent expression. An equivalent expression

asked by Carmen on September 21, 2008
19. ## Algebra

1) translate to an algebraic expression: one less than a product of two numbers A: xy-1 2) 12/25 = ? A: ? = .48 3) Find -x when x= -25/41 (this is a fraction) A: -x = 41/25 4) Use a commutative law to find an equivalent expression. An equivalent expression

asked by Carmen on September 21, 2008
20. ## History

All of the following account for nativist sentiment against the New immigrants of the late 19th century EXCEPT that the immigrants a. practiced different religions b. had different languages and cultures c. were willing to work for lower wages than were

asked by Jack on January 26, 2010
21. ## AP CHEMISTRY

Please could you help me predict the products of the following reactions: ( I cant figure them out) THANX in advance! 1) CaO powder is added to distilled water. 2) Acetic acid solution is added to solid sodium hydrogen carbonate. 3) Potassium permanganate

asked by DAN on May 27, 2012
22. ## Chemistry

Potassium permangenat reacts with sodium oxalate to form carbon dioxide and Mn2+.determine the consentration of a permangenate solution.since the reaction runs in acidic conditions, 25ml of 2 M sulfuric acid was added to 20.00ml of the unknown permangenate

asked by Aida on October 11, 2015
23. ## PHYSICS helppppp

a horizontal wire is stretched between two vertical poles. when a 12.0-N weight is suspended at its center, the wire sags until the angle between its halves is 110 degrees. what are the forces exerted by each half of the wire in supporting the weight? i

asked by Katrina on November 12, 2006
24. ## Math

Bill's baseball bag weighs 4 pounds . If he takes out 2 pairs of cleats that weigh 6 ounces each . How much will his bag weigh? Please show the work

asked by Ls on April 5, 2016
25. ## Physics

Help me please I'm stuck on this question 2.In a thunderstorm at 20.0°C, Karen sees a bolt of lightning and hears the thunderclap 3.00 s later. How far from Karen did the lightning strike? Show your work.

asked by Me and I on April 14, 2014
26. ## Geometry

If the rule (x, y) ¡ú (x + 3, y ¨C 3) is applied to the original triangle, give the coordinates of and draw the image. Show your work for calculating the coordinates of the resulting image.

asked by Christian on September 25, 2011
27. ## Chemistry need help

using standard potentials given in the appendices calculate the standard cell potentials and the equilibrium constants for the following reactions. Zn(s)+( Fe^2+(aq)) ---> (Zn^2+(aq))+ Fe(s) If anyone can show work, then I can do the rest of my homework by

28. ## Math - Slopes

A carpenter is building a stairway. The depth of each stair is 10 inches. The height of each riser is 8 inches. WHat is the steepness (slope) of the stairway? Please show work.

asked by Lila on November 1, 2009
29. ## Physics

Marshall applies a constant force of 20N to a box and causes it to move at a constant speed of 4m/s. Show that the work he does in moving the box in 6s is 480J. KE/2v^2=m?

asked by sherri on April 6, 2010
30. ## need help in math

Please show your work thanks for your help. A children's store sells a toy racetrack for \$94.25. The owner uses a 45% markup based on cost. What was the whole sale cost of the racetrack?

asked by Anonymous on November 9, 2007
31. ## physics

Marshall applies a constant force of 20N to a box and causes it to move at a constant speed of 4m/s. Show that the work he does in moving the box in 6s is 480J.

asked by sherri on April 5, 2010
32. ## geometry

asked by Anonymous on February 16, 2012
33. ## Math Problem2

List all possible rational zeros for the polynomial below. Find all real zeros of the polynomial below and factor completely. Please show all of your work. f(x) = 5x^4 – x^3 - 33x^2 – 43x – 16

asked by Greg - PV on June 9, 2011
34. ## Physics

Please help me go through this F = q1q2/r^2, i know this is the equation, but i don't know how to get the answer, please help. What is the electric force between a +2 µC point charge and a –2 µC point charge if they are separated by a distance of 5.0

asked by Me and I on May 15, 2014
35. ## math

Find 10% of \$500 and 10% of \$300. Since 6% is a little more than half of 10%, what is half of 10% of 500? Add this with 10% of 30, since 8% is close to 10%.Does your answer make sense. Please show work so i can understand

asked by Thomas on January 6, 2014
36. ## HELP RIGHT AWAY

8. Convert the map scale to a unit rate. How many inches represent one mile? Show your work. Interpret the meaning of the unit rate

asked by LOL on November 20, 2015
37. ## Math

Yikes McTugg bought 1/2 pound of potato salad. He 2/3 of it for lunch. How much potato salad was left for an afternoon snack? (SHOW ALL WORK)

asked by Reyna Aureolus on November 19, 2018
38. ## Calculus

I have two similar problems that I need help completing. Please show all your work. Question: Find the limit L. Then use the å-ä definition to prove the limit is L. 1. lim (2x+5) x->3 2. lim 3 x->6 Thank you for your anticipated help!!

asked by Liz on June 27, 2012

The total number of interior angles in two regular polygons is 17, and the total number of diagonals is 53. How many sides does each polygon have? Show work and explain.

asked by Anonymous on December 18, 2011
40. ## calculus

use the properties of logarithms to condense the logarithmic expression. write the expression as a single logarithms whose coeffient is 1. Inx+In5=? Can you show work

asked by Heather on January 7, 2013
41. ## Art

Please can someone name an artist who bases their art work theme on 'good and bad' or 'good and evil'. And an artist who uses colour to show emotions? Thankyou!

asked by Cat on April 19, 2009
42. ## physical science

What length of German silver wire, diameter 0.050 cm, is needed to make a 28 Ωresistor, if the resistivity of German silver is 2.2 × 〖10〗^(-7) Ω m (show work)

asked by michelle on February 17, 2017
43. ## physics

A car speed up from 18m/s to 34 m/s in 2 seconds A) find the cars acceleration must write down all given information and show the work B) What does this acceleration tell us about the motion of the car?

asked by lisa on May 3, 2012
44. ## math

An opening for a movie, every 12th person gets a free ticket, every 15th person gets free popcorn. How many people get both prizes?(please show work)

asked by anonomous on April 22, 2008
45. ## financial management

show me how to work a forecast personnel expenses & total revenues using weighted moving averages & moving averages using 3 fiscal years

asked by june on March 28, 2012
46. ## math

There are 6 boys and 8 girls in a group of students. Calculate the number of ways that a committee of 3 students which has at least 1 girl can be selected from the group. Please show your work.

asked by corey on May 23, 2011
47. ## algebra

want to know if this right simplify and show all work -3x^2+4xy+7y^2+2(-3x^2+5xy+11y^2) -3x^2+4xy+7y^2-6y^2+10xy+22y^2 -3x^2+14xy+45y^2 and -6a-4a-2(100^2+3a) -6a-4a^2+200+3a 3a-4a^2+200

asked by babygirl on September 3, 2011
48. ## Chemistry

A gas has a volume of 500 mL at a temperature of -45.0°C. What volume will the gas occupy at 30.0°C? Show your work. What equation should I use for this one? Sorry but my allergies have me feeling drained. Where should i start on this one?

asked by bubble dragon on February 9, 2016
49. ## geometry

use diagram given: m

asked by eric on April 6, 2015
50. ## Math

PLEASE SHOW YOUR WORK OR EXPLAIN... Mr. Webb gave his waiter a \$5.60 tip on a \$40 bill. What percent tip did he give the waiter?

asked by Alyssa on January 21, 2015
51. ## statistics-normal approximation, distrubution

find the normal appproximation for the binomial probabiolity the x=5,where n=12, and p= 0.7. compare this to the value of p(x=5). *please show calculations and work. want to compare my calculations. thank you. mary

52. ## math

The surface area of the moon is 37932330 km square. Calculate the side length of a square with the same area.Show your work.

asked by cool1997 on September 29, 2011
53. ## Statistics

Starting with the data values 70 and 100, add three data values to the sample so that the mean is 81, the median is 94, and the mode is 94. Please show all of your work.

asked by robyn on October 6, 2011
54. ## math

If unequal quantities are subtracted from equal quantities, the remainders are unequal in the opposite order. Since 25=25 and 5>3, then 20d, then x-a

asked by Johnny on May 13, 2014
55. ## math exam tommrow review

the mean score on a math test taken by 15 students was 82%. one more student takes the test late and earns 93%. what is the new mean score? please show work

asked by ellis on December 18, 2012
56. ## math work

a dress orginally sold for \$120 is now being sold for \$96. by what percent was the prginal price of the dress discounted? please show work.

asked by ellis on November 17, 2012
57. ## Math

determine vertex, focus and directrix of parabola. then graph the parabola. first equation: y^2 -2x-8=0 second equation: y^2 -4y -12x= 8 please show your work!

asked by doug on May 18, 2008
58. ## math

i am a fifth grader and behind in math can you show me how to work this problem. two angles in a triangle are given. find x if x is the third in the triangle. 100 degree, 56 degree, x

asked by Anonymous on March 31, 2011
59. ## Math

Hi! You need 2 cups of water, but you only have a liquid measuring cup that measures up to 3 pints. what can you do to get the 2 cups of water that you need? explain and show your work.

asked by Jessica L. on January 15, 2018
60. ## Algebra

six people can paint a house in 3 days, how long it would take two people to paint it? I should show steps. It is related to rte of work.

asked by Leilah on March 8, 2011
61. ## Math

(1) 8/1 divided (-3 2/5) My answer is 68/1 (2) 3 2/3 divided by -8 6/7 answer 682/21 3) 41/5 x -8/5 =32/25 Please I need help i'm so confused please show work so I can understand these other 27 problems that i have to complete. Thank you Ms. Sue

asked by Ana on December 10, 2013
62. ## Chemistry

A gas occupies a volume of 140 mL at 35 degrees celcius and 97 kPa. What is the volume of the gas at STP? Please show the work.

asked by Maria on February 23, 2010
63. ## geometry

The scale factor is 5/4. Find the area of the pre-image if the area of the image is 150 in2.Show your work.

asked by bre on March 27, 2013
64. ## Science

Na subscript 2SO subscript 4 + CaCl subscript 2 produces CaSO subscript 4 + NaCl Please help me balance this equation and show your work

asked by Katie on February 28, 2012
65. ## Math

Penelope's cookie recipe calls for 3/4 of a pound of butter. If she only wants to make 1/2 of the recipe, how many pounds of butter should she use? Show your work.

asked by Anonymous on April 11, 2017
66. ## Algebra

\$9500 is invested part of it at 12% and part of it at 7%. For a certain year the total yield is \$960.00. How much was invested at each rate? Please show work

asked by Kia on November 12, 2012
67. ## Pre-Calc

Verify the identity. Show your work. cot2x + csc2x = 2csc2x - 1 1+cosec^2x +cosec^2x Cot^2x+cosec^x= 1+2 cosec^2x Would this be correct?

asked by Liz on May 24, 2016

Out of 42 kids in a class twice as many failed Ela as math,4 failed both. If 7 failed neither, find how many failed each subject. Please help and show work it would be great thanks i really need help thanks

asked by Ray on June 6, 2011
69. ## Trig

2 vectors act on a bolt. vector 1(1200/70 degrees) vector 2(900/205 degrees) then E = ? must show work!

asked by Stone on November 15, 2013
70. ## Science

If on earth you weigh 420 newtons, and the gravitational pull on the moon is 1/6 of what it is on earth. What would be your weight on the moon?? Please show work Thanks!! :)

71. ## Trig

2 vectors act on a bolt. vector 1(1200/70 degrees) vector 2(900/205 degrees) then E = ? must show work!

asked by Stone on November 15, 2013
72. ## Algebra

For the given quadratic equation convert into vertex form, find the vertex, and find the value for x = 6. Show your work. y = -2x2 + 2x +2 -(1/2)y = x^2 - x - 1 (-1/2)y + 1 = x^2 - x (-1/2)y + 1 = (x - 1/2)^2 - 1/4 (-1/2)y = (x-1/2)^2 - 5/4 y = -2(x-1/2)^2

asked by Alexa on February 16, 2016
73. ## Math

Matt puts 3 1/2 quarts of lemonade in the pitcher. He adds another 1/2 quarts. How many pints of lemonade does he have total? PLEASE SHOW WORK! :[

74. ## Chemistry

How many moles of compound are present in 17g of Fe2O3? I think I know how to do this, so if someone can show me so I can check my work against it. My answer was .106 moles of Fe2O3.

asked by Kiana on March 22, 2016
75. ## Math

The sum of two numbers is 15. Three times the second number minus four times the first number equals 4. What are the missing variables? Please show your work.

asked by Connie on May 12, 2016
76. ## Math

Which of the following is TRUE about the line through the points (–1, 4) and (–1, 2)? Please EXPLAIN/SHOW WORK. A. The slope is undefined B. The slope is negative C. The slope is 0 D. The slope is positive

asked by Carmin on June 24, 2009
77. ## Math

A triangle has side lengths 10, 15, and 7. Is the triangle acute, obtuse, or right? Show your work and explain. I think it's gonna be an obtuse and maybe right....might be wrong...

asked by Alex on September 10, 2015
78. ## Statistics

Starting with the data values 70 and 100, add three data values to the sample so that the mean is 96, the median is 97, and the mode is 97. Please show all of your work

asked by denise on June 23, 2011
79. ## Statistical Math

Starting with the data values 70 and 100, add three data values to the sample so that the mean is 90, the median is 91, and the mode is 91. Please show all of your work.

asked by Jenn on May 26, 2012
80. ## math

show work A survey of 400 peopl found that 66 were left handed. What percent of those surveyed were left handed?

asked by shanae on November 6, 2007
81. ## 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

asked by Alex on December 18, 2014
82. ## Orthocenter Question

Triangle ABC has vertices A(0,6), B(4,6) and C(1,3) Find the orthocenter of triangle ABC. Please show your work so that I can understand how to do this type of problem. Thank You I really appreciate your help ^_^

asked by Hilary on January 3, 2012

Out of 42 kids in a class twice as many failed Ela as math,4 failed both. If 7 failed neither, find how many failed each subject. Please help and show work it would be great thanks i really need help thanks

asked by Dan on June 6, 2011
84. ## College pre-algebra

how do I simplify the following expressions and show my work? 6+5[(12 div. by2)+5]. (4div.by2)+8(5-3)to the second power. -8-72Div.by9x4to the second power + 11.

asked by Sherrie on November 17, 2011
85. ## calculus

find the midpoint of the line segment joining the points P_1 and P_2. P_1=(-2,6); P_2=(5,0) m=(x,y) please show work

asked by anonymous on December 9, 2012
86. ## Algebra

A rectangle's length is 6 less than twice its width. The perimeter of the rectangle is 36 units. Set up and solve a system of equations to determine the length and width.

asked by Kevin on February 26, 2017
87. ## Algebra

A rectangle's length is 6 less than twice its width. The perimeter of the rectangle is 36 units. Set up and solve a system of equations to determine the length and width?

asked by Carla on February 26, 2017
88. ## College Physics

Part A) A 2.2 kg rock is released from rest at the surface of a pond 1.8 m deep. As the rock falls, a constant upward force of 5.0 N is exerted on it by water resistance. Let y=0 be at the bottom of the pond. Calculate the nonconservative work, Wnc , done

asked by Kyle on March 3, 2010
89. ## chemistry

Suppose that after measuring the pH of 1.05 M HCl solution, three drops (0.20 mL) of the solution remain behind on the pH electrode. a) When this electrode is then dipped into 100 mL of pure distilled water, show by calculation that the pH of the water is

asked by Nicollette on September 29, 2015
90. ## trigonometry

We begin by setting t=sin 18 degrees we weill think of t an an "unknown" angle and solve to get the exact value. Use a double angle formula to show that cos 36 degrees=1-2t^2

asked by Anonymous on November 12, 2012

given that sinx, tanx, and sin2x form geometric sequence, show cos^3x=1/2 can someone explain this to me, i have no idea how to solve it. i really done understand how to turn it into a geometric sequence

asked by AA on November 5, 2016
92. ## Math

If someone earns \$960 interest over 4 year period on a \$6,000 investment, how do I solve this to find the percentage of interest per year. I know it is 4%, I just can't figure out how to show the math.

asked by Anonymous on October 15, 2009
93. ## Chemistry

The standard solution were prepared by transferring exactly 1.00 mL, 2.00 mL, 3.00 mL, 4.00 ml, and 5.00 ml, respectively, of stock solution to clean 100 ml vol flads, diluting to the mark with FeCl3 solution, and then filling the aoorioruatekt kabeked

asked by Anonymous on February 3, 2008
94. ## Chemistry

In chemical analysis, it is often necessary to prepare a solution by diluting a stock solution.Calculate how much of a 5.337M NaOH is needed to make 1.669 liters of a 0.063M sodium hydroxide solution. (Remember to include units.)

asked by Alex on August 26, 2015
95. ## Government

1. "A peice of coastal land, and surrounding fishing areas, has been occupied by a fishing society for centuries. This society does not have any government, or knowledge that any larger government rules over them" Do political scientists consider the

asked by Lexi on September 29, 2016
96. ## Help needed- PreCalc

Please help me understand how to solve this questions. I need step by step solution and answer because I find it difficult to understand when someone on here writes the answer instead of showing step by step work on how he/she got the numbers to get the

asked by chichi on August 4, 2016
97. ## math(galerkin,collocation)

can some one plz help how to make trial function for solving equations in collocation and galerkin methods which satisfy the given boundary conditions. example y"+y=3*square(x) with y(0)=0 and y(2)=3.5. is there some method of making trial func or we have

asked by jesse erika on May 15, 2013
98. ## chemistr

10g of nacl were added to 10ml of water. he resulting solution was diluted to be a final volume of 250ml. Calculate the molarity of the solution. My calculation 10g/58g/mol = 0.173M 0.173M/025L =0.689M Given the density of the solution is 0.9864g/ml.

asked by Fai on December 25, 2012
99. ## Math

The two cereal boxes shown have corresponding edges in a ratio of 2:3. If the smaller box sells for \$2.50 and the larger box for \$4.00, which is the better buy? Why? What assumption(s) do you have to make when solving the problem? Estimate, then check.

asked by Punkie on December 16, 2009
100. ## Physics

You drop a 2 kg textbook to a friend who stands on the ground 10m below the testbook with outstreatched hands 1.5m above the ground. a) how much work W_g is done on the textbook by the gravitational force as it drops to your friend's hands? b)What is the

asked by Jamie on January 2, 2007