# 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 107

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
2. ## 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
3. ## 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! :[

asked by Adaija on January 7, 2013
4. ## 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
5. ## 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
6. ## 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
7. ## 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
8. ## 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
9. ## 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
10. ## 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
11. ## 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
12. ## 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
13. ## 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
14. ## 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
15. ## 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
16. ## 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
17. ## 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
18. ## 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
19. ## 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
20. ## 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
21. ## 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
22. ## 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

asked by mary- can someone please solve,lost on October 28, 2010
23. ## 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
24. ## 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
25. ## 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
26. ## 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
27. ## 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!! :)

asked by Madelyn Santiago on September 4, 2012
28. ## 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
29. ## 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
30. ## 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
31. ## 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
32. ## 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
33. ## 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
34. ## 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
35. ## 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
36. ## 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
37. ## Advance function

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
38. ## 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
39. ## 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
40. ## 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
41. ## 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
42. ## 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
43. ## chemistry

A saturated solution of NaCl (dissolved in water) has a concentration of 4.01 M at a given temperature. The solution has a volume of 1 L (1000 mL). If the water were to evaporate until the volume of the solution is 500 mL (and then stirred), what would the

asked by Avi on February 14, 2013
44. ## chemistry

You have a 1.0 M stock solution of H2SO4 in a large flask. You need to dilute this to make a 0.25M solution of H2SO4 for an experiment. If you need exactly 100.0mL of the diluted solution, how would you make the diluted solution?

asked by brit on July 29, 2014
45. ## algebra

A laboratory assistant is asked to mix a 30% alcohol solution with 21 liters of an 80% alcohol solution to make a 60% alcohol solution. How many liters of the 30% alcohol solution should be used? need help do not understand this question how would i set

asked by elementary and intermediate algebra on March 8, 2015
46. ## Biochemistry

In one glass - 100,0 mL 0,100M KOH solution, in other - 100,mL 0,100M HNO2 solution. What is pH of solution, which was get when both solutions were mixed up (consider that V of forthcoming solution is sum of original solutions - 200,0 ml)

asked by Anonymous on March 27, 2012
47. ## chemistry

An aqueous solution contains 38.6 g NaCI per 155 mL of solution. This solution is _________.

asked by Jim on May 3, 2010
48. ## chemistry help

A solution of AgNO3 contains 29.66 g of solute in 100.0 mL of solution. What is the molarity of the solution?

asked by chris on May 9, 2009
49. ## AP Chemistry

50.0 mL of an HCl solution with a pH of 3.5 neutralizes 200.0 mL of a Ca(OH)2 solution. What is the molarity of the Ca(OH)2 solution?

asked by Gabriella on January 30, 2014
50. ## Chemistry

I have a 7 mL solution with 3 mL of H2O added to the solution. How would I figure out the molarity of the solution?

asked by TAG on March 31, 2008
51. ## math

How much 10​% solution and how much 65​% solution should be mixed together to make 100 gal of 35​% ​solution? Thank you!!

asked by Jessica on September 11, 2018
52. ## Chemistry

What is the concentration of a H2SO4 solution if 10.0 mL of the solution is neutralized by 7.8 mL of a 0.20 M NaOH solution?

asked by Ivy on December 6, 2010
53. ## chemistry

What is the concentration of a HNO3 solution if 10.0 mL of the solution is neutralized by 3.6 mL of a 0.20 M NaOH solution?

asked by NADIA on March 10, 2011
54. ## Chemistry

Consider a 500mL solution containing 2.0×10^-5 mol HCl ·what is the pH of the above solution? ·If the solution is diluted to 1.5 L what will be the new pH?

asked by Mayra on May 29, 2016
55. ## math

How many militers each of a 40% solution and a 10% solution are needed to make 200ml of a 20% solution?

asked by Megan on November 4, 2018
56. ## Pre calculus

How do I solve this exponent problem? I understand the exponent rules, but I getting 1 but 1 is not the answer! I don't want anyone to solve the problem for me, I want to learn how to solve this type of problem. Thank you! Solve the equation: -8=-3-6

asked by anon on March 27, 2013
57. ## chemistry

A home swimming pool is disinfected by the daily addition of 0.50 gal (1 gal = 3.785 L) of a "chlorine" solution–NaOCl in NaOH(aq). To maintain the proper acidity in the pool, the NaOH(aq) in the "chlorine" solution must be neutralized. By experiment it

asked by joe on October 9, 2012
58. ## 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
59. ## Science

What process involves the comparison of rock layers with others in a sequence to determine its age? radioactive decay radiometric dating relative dating absolute dating To determine the most accurate and precise age of Earth's oldest rocks, geologists

asked by Abby on October 30, 2013
60. ## Physics

A basketball player makes a jump shot. The 0.700 kg ball is released at a height of 2.10 m above the floor with a speed of 7.30 m/s. The ball goes through the net 3.10 m above the floor at a speed of 3.10 m/s. What is the work done on the ball by air

asked by Mary on February 23, 2007
61. ## CALCULUS!!!

case 1. Find the absolute maxima and minina values of f(x)=sin2x+cos2x on [0, pie] Specify both the x and y coordinateof the absolute maximum and absolute minimum. Gives answers in exact form. case 2. Use the second derivative test for relative maxima nd

asked by Mae on June 24, 2007
62. ## chemistry

2- A 0.310 M solution of a weak acid, HX, has a pH of 2.53 a. Find the [H+] and the percent ionization of nitrous acid in this solution. b. Write the equilibrium expression and calculate the value of Ka for the weak acid. c. Calculate the pH of the

asked by bob on March 25, 2012
63. ## Pre-Algebra

Can anyone show me step by step how to solve this problem? 26cm/s = m/min convert this problem using dimensional analysis.kj

asked by kj on January 1, 2011
64. ## Mathematics

Given that 2cos^2 x - 3sin x -3 = 0, show that 2sin^2 x + 3sin x +1 = 0? Hence solve 2cos^2 x + 4sin x - 3 = 0, giving all solutions in the interval 0 ≤ x ≤ 2π

asked by Sean on November 18, 2015
65. ## algebra

write an equation of the line containing the given point and parallel to the given line (3,-3) 7x-2y=5 need help please 7(3)-2(-3)= 5 ? 21- 6= 5? this does not look right, please show me where I am supposed to place the (3,-3)to solve the equation thanks

asked by Chrysanne on December 20, 2009
66. ## math

If side of triangle are in the ratio 3:4:5 and its perimeter is 24 cm, find measure of each side of triangle. How to solve this Questions please show.

asked by Kamla Devi Public School on December 12, 2016
67. ## math

how do you solve this can you please show me step by step y/2 -5y/6 +1/3= 1/2 15/8z + 1/4 = 4

asked by Sara! on May 26, 2010
68. ## Math Help!

Help me please. Not sure how to solve this. Can someone show me how to do it step by step. -2/5x-9

asked by Amber on October 21, 2016
69. ## math plz help

how do you solve these please show me how you do these step by step 1. y/2 -5y/6 +1/3= 1/2 2. 15/8z + 1/4 = 4 3. 4/5 - 2p/5= 6/5 thank you

asked by Sara! on May 26, 2010
70. ## maths

Solve k^2 + km = 8 m = k- 6 Can you show me step-by step please?

asked by Annette on September 21, 2009
71. ## Maths

Solve k^2 + km = 8 m = k- 6 Can you show me step-by step please?

asked by Annette on September 21, 2009
72. ## ALGEBRA II

ln(x+5)=4 COULD YOU SHOW HOW TO SOLVE THIS STEP BY STEP. THANX!

asked by DAN on May 23, 2012
73. ## accounting

________________________________________ Question 1: (10 points) E 5-2 Installment sales method; journal entries LO2 Charter Corporation, which began business in 2006, appropriately uses the installment sales method of accounting for its installment sales.

asked by Abeam on October 8, 2008
74. ## chemistry

A 27.00 mL sample of an unknown H3PO4 solution is titrated with a 0.110 M NaOH solution. The equivalence point is reached when 25.78 mL of NaOH solution is added. What is the concentration of the unknown H3PO4 solution? The neutralization reaction is:

asked by Amanda on September 27, 2012

PlEASE HELP ME!!! I WOULD GREATLY APPRECIATE IT!!!! Find the least upper bound (if it exists) and the greatest lower bound (if it exists) for the given set. Please show all work. (0, 2) (−∞, 1) {x : x2 < 4} {x : x4 ≤ 16} {5/2,7/3,9/4} {0. 9, 0. 99,

asked by Anonymous on March 21, 2009
76. ## Calculus - Approximation

Use linear approximation, i.e. the tangent line, to approximate cubed root { 1.1 }. The equation of the tangent line to f(x) at x = 1 can be written in the form y = mx+b. Show your work. Do not use a calculator.

asked by James on October 7, 2016
77. ## calculus help me pllllllllllz

Find out what kind of improper integral is given below §dx/{x^4+4}....?,hence evaluate the integral with upper boundary=infinity lower boundary =0 i need help plz show me full work

asked by samuel on September 26, 2016
78. ## Math

rose is getting a snare drum for her birthday! They are 14 inches in diameter. I want to wrap ribbon around 4 times. How many inches of ribbon do i need? write the formula, and show your work.

asked by Miracle on May 24, 2016
79. ## Chemistry-TITRATION

A titration of 15.0 cm3 of household ammonia, NH3, required 38.57 cm3 of 0.78M HCl. Calculate the molarity of the ammonia. please show work and detail.

asked by Paige on January 15, 2009
80. ## math

Show that the equation z(z¯) + (a¯)z + a(z¯) + b = 0 with (a as element of complex number) and (b as element of real number) represents a circle in C. please help me, hints will work also as i don't know how to start this question :)

asked by lim on September 7, 2016
81. ## Algebra 2

Please show your work to find the mean and standard deviation of the data. Round to the nearest tenth. 20, 16, 18, 14, 9, 20, 16 I know i have to add all them and divide the answer by 7. And that's my mean , But Idk how to get the standard deviation ?

asked by Ciaria on March 31, 2015
82. ## math

A school spent \$1,802 on 6 new microscopes for science classes. Each microscope cost the same amount of money. Find the cost of 1 microscope. Show your work.

asked by Kim on February 22, 2014
83. ## Calculus

Find the equation of the tangent line and the normal line to the graph of the equation at the indicated point. x^2-y^2=16, (5,3) I need to show work, so answers formatted in this manner would be most appreciated. Thanks! :) :)

asked by Jon on November 11, 2007
84. ## physics

Three cubic meters of liquid nitrogen has a mass about 2700 kg. When this much liquid nitrogen evaporates into gaseous air of density 1.25 kg/m3, what will its volume be? Show your work

asked by Stuart on February 6, 2017
85. ## calculus

The midppoint of the line segment from P_1 to P_2 is (-5,4). If P_1=(-2,2), what is P_2? For the given equation list the intercepts and test for symmetry. 49x^2+y^2=49 Please show work

asked by spazed out on December 4, 2012
86. ## Chemistry

If a sample of gas occupies 2.1 ml at a pressure of 896 torr, what volume (ml) will it occupy at a pressure of 316.8 torr. I really need an answer, but also please show me how to work this problem.

asked by Linzy on March 25, 2013
87. ## ASTRONOMY-HELP PLEASE!!!!!

Using Hubble's law, determine the recessional velocity of a galaxy 700 Mly away. Use 22 km/s/Mly for the Hubble's parameter. Show your work for full credit

asked by Rebecca on December 5, 2011
88. ## Math

Convert the map scale to unit rate. How many inches represent one mile? Show Your work. Interpret the meaning of unit rate. 3/10 in. = 7/8 miles

asked by Jack on November 9, 2017
89. ## physics

You must show your work for full credit.) Calculate the circular speed of an object that orbits the Sun at a distance of 0.2 AU (1 AU = 1.5e+11 meters, the distance between the Earth and the Sun)

asked by jennifer on March 7, 2014
90. ## Science grd 9

Determine which appliance uses the most electrical energy: a clothes dryer that operates for 30 min/day or a freezer that operates for 24h/day. Please show work

asked by Gagan on December 2, 2010
91. ## math

john counts backward from 140by twenties and lee counts backward from 120 by tens.how many of the same numbers do they say down to zero? can only body show me how to work out please,thankss

asked by wan on April 11, 2014
92. ## math

Upon leaving Mexico Asanji decided to convert all his pesos back into dollars. how many dollars did he receive if he exchage 42.7 pesos at a rate of \$5.30 = 11.1. Show work please

asked by Jordynn on January 12, 2010
93. ## Chemistry

The solubility product constant of Calcium hydroxide is 6.5 * 10^-6 . If 0.10 mo of sodium hydroxide is added to 1 L of 0.0001 M Ca(OH)2, what is the final concentration of the calcium ion? Show your work.

asked by Ian on May 18, 2016
94. ## Math

I need some help with this question. I am getting a different answer (the actual answer should be 259). Question: When the repeating decimal 0.476 is converted to a rational in simplest form a/b the value of b-a is? Show your work.

asked by Kassie on January 19, 2019
95. ## Geometry

A man has a garden 10 meters square to fence. How many fence posts are needed if each post is 1 meter from the adjacent posts? Question says to show work.

asked by christy on November 14, 2011
96. ## astronomy

You must show your work for full credit.) Calculate the circular speed of an object that orbits the Sun at a distance of 5.2 AU (1 AU = 1.5e+11 meters, the distance between the Earth and the Sun)

asked by Gerson on July 15, 2012
97. ## Chemistry

SHOW WORK A 44g sample of CO2 has a volume of 22.4 L at STP. The sample is heated to 71 degrees Celsius and compressed to a volume of 18.0 L. What is the resulting pressure?

asked by Caitlyn on December 4, 2013
98. ## Math: THIS IS SOOOOO HARD!!!!!!!!!!

Convert the map scale to a unit rate. How many inches represent one mile? Show your work. Interpret the meaning of the unit rate. 3/10 in. = 7/8 mi. I Cant Figure This Out!!!! HELP!!!

asked by Agal on November 3, 2016
99. ## physics

The vector position of a 3.75 g particle moving in the xy plane varies in time according to the following equation. At the same time, the vector position of a 5.20 g particle varies according to the following equation. For each equation, t is in s and r is

asked by carlton on November 27, 2011
100. ## environmental science

the warming of the oceans causing less carbon dioxide to be soluble in them, and at the same time leaving more carbon dioxide in the atmosphere causing an increased warming of the atmosphere, is a example of a a. model of a system showing a paradigm shift.

asked by jj on October 12, 2016