# 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 502
1. ## Managerial Economics

Managerial Economics uses_____to help solve problems. a. mathematical programming b. Statistics c. decision sciences d. microeconomics e. all of the above

asked by John on September 20, 2007
2. ## math

Find the simple interest of#108,000 for 2 years at 1 and the half percent per annum.pls solve

asked by Tj on November 1, 2010
3. ## math

Find the simple interest of#108,000 for 2 years at 1 and the half percent per annum.pls solve

asked by Tj on November 1, 2010
4. ## math

shawna reduced the size of a rectangle to a height of 2 in. what is the new width if it was originally 24 in wide and 12 in tall ? how do you solve it if the answer is 4?

asked by kimberly on November 17, 2011
5. ## Chem LAB

Write the net chemical equation for below equations H2O2 + 2I- + 2H+ -----> 2H2O + I2 2 S2O32- + I2 -----> 2I- + S4O62- How do you solve for this problem

asked by Mindy on April 14, 2016
6. ## math algebra

Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x=

asked by student on April 16, 2013
7. ## Pre-Cal

Convert the given exponential function to the form indicated. Round all coefficients to four significant digits. f(x) = 9e^3x; f(x) = Ab^x How do i solve the equation with this formula? Thanks

asked by Anne on February 29, 2012
8. ## Math

Hi could you please solve this as quick as possible, thanks. A tree 34 m high cast a shadow 12 m long. The angle of the inclination of the sun is closest to: A 70 B 21 C 69 D 19 E 79 Thanks

asked by Jordan on June 1, 2014
9. ## Geometry

If RS is a midsegment of triangle HIT and parallel to side HI, and RS is 2x + 6 and HI is 5x + 9, write and solve an equation to find the lengths of the segments. How do I go about doing this?

asked by Steeb on December 10, 2017
10. ## Math

Starting at 1:00 p.m., the temperature changes −4 degrees Fahrenheit per hour. Write and solve an equation to find how many hours xx it will take to reach −1°F.

11. ## Math

Use a graphing calculator to solve the equation -3cost=1 in the interval from.0

asked by Steve on October 18, 2017
12. ## Trigonometry

using csc = 3.75, solve for sides: a= 3 b= ? c= ? and the remaining five trigonometric functions: sin= (1/3.75) cos= ? tan= ? sec= ? cot= ? *b is not 1; and c is not 3.75

asked by Brandi on March 18, 2013
13. ## Math

What rate would it take to double an object valued currently at \$100 in 6 years? I would like to know the answer and the equation/steps taken to solve the problem.

asked by Andrew on March 23, 2010
14. ## Mathematics

Solve the proportion using cross products. Round to the nearest hundredth if necessary. 18. 22m/55h = 12m/h hours 48 30 45 22

15. ## Physics HELP!!!

A ball is kicked at an angle of 50 with a velocity of 14m/s. a. how long is it in the air? b. how high does it rise? can someone please explain to me how to solve this???

asked by Lauren on October 21, 2008
16. ## Math

Why do teachers 👩‍🏫 teach us many unimportant things! Like for example, in math.... dividing decimals or um 😐..... oh yeah....1 plus 1 . I mean no grownupwould solve that I mean it’s so unecsessary

asked by Asha on November 28, 2018
17. ## College Pre-Algegra

1. Find the exact value of tan660 using the functions of 330deg. 2. Solve the equation 2sin^20+5sin0+3=0 on the interval 0

asked by clifford on June 12, 2011
18. ## Engineering Science

The meter reads 7.84 mA when the switch is in position A. What is the resistance of R4? R1=220 Ω R2=470 Ω R3=510 Ω VS =12 V I honestly have no clue how to solve this. Please help.

asked by Mike on October 6, 2018
19. ## Math

I'm haveing trouble with this problem, I've tryed all of the methods/tricks I have learned to solve these kinds of problems, and none of them have worked. (-5)x=3x-22

20. ## math

The two figures are similar, solve a proportion to find the length n. Express the result as either a whole number or use decimal digits only if necessary. * * * * * * 15 cm 12 cm * * n 9 cm * * * * * * * * ** * * * * * * * ** * * * * * * * * *

asked by Cheril on April 12, 2012
21. ## math

The two figures are similar, solve a proportion to find the length n. Express the result as either a whole number or use decimal digits only if necessary. * * * 15 cm 9 cm * * * * * * * * * * * * * * 12 cm * * n * * * * * * * * * * * * * *

asked by Cheril on April 12, 2012
22. ## Geography (Ms. Sue)

In developing their city, how did the people of Montreal solve the problems of a severe climate? Which of the five themes apply to this situation?

asked by Anonymous on September 7, 2013

Use L'Hospital's Rule to solve: lim u --> 1 of (u-1)^3/ ((1/u) - u^2 + (3/u) - 3) Ok, so what I thought was that it is type 0/0 so taking the derivatives of the top and bottom 3(u-1)^2 /(-u^-2 -2u - 3u^-3) and subbing in u = 1 = 0/-6 = 0

asked by Mary on November 12, 2014
24. ## physics

21. A traffic signal of mass 25.0 kg is suspended by two cables as shown in the diagram below. Solve for the tension in each cable each of the following scenarios: (a) θ1 = θ2 = 20.0°, and (b) θ1 = 20.0°, θ2 = 30.0°.

asked by Danny on February 17, 2015
25. ## algebra

a+ sqrt 2 = 7 Solve the question for both the exact irrational root and its rational approximation to the nearest tenth. THANK YOU FOR YOUR TIME AND HELP

asked by april on May 23, 2010
26. ## Math

How do find the inverse function for this problem: f(x) = -(x+3)^2, x is greater or less than 3 I know the first thing you do is switch the variables, so it looks like this: x = -(y+3)^2 Then expand: x = -y^2-6y-9 And solve for y: x + 9 = -y^2-6y I get a

asked by Monique on August 8, 2009
27. ## science

Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life

asked by ttng on August 31, 2016
28. ## math

i cannot solve the math question i was given. Problem: a chef has to divide 5 heads of lettuce on 12 plates, this answer is to be afraction.

asked by dominick on December 15, 2015
29. ## math

The two figures are similar, solve a proportion to find the length n. Express the result as either a whole number or use decimal digits only if necessary. * * * 15 cm 9 cm * * * * * * * * * * * * * * 12 cm * * n * * * * * * * * * * * * * *

asked by Cheril on April 12, 2012
30. ## Math

i have a couple questions what are the least common multiples of these number sets (30,65) (66,55,44) (29,58,4)(20,55)(180,252) and 21,16 then i need someone to solve these inequalitys x-7

asked by Julie on March 10, 2008
31. ## history

do the usa and china leaders cooperate to solve problems such as finance, trade,tyrants, and/or military actions?

asked by mary on March 13, 2011
32. ## Physics

A wagon was used to move a 90 lb rock 120 yds. It took 40 sec and 70 lbs of force. Can someone help me solve for efficiency and horsepower????? PLEASE :)

asked by Heather on December 11, 2007
33. ## AlGEBRA

Movie ticket is 8.00, popcorn is 5.00, and drink is 3.00. I have 40.00 to spend. How many games can I play if each game is 2.50? Translate into inequality and solve.

asked by sweet pea on February 4, 2015
34. ## Tod

Solve the linear programming programing by graphing and then determining which vertex minimizes the objective function C=3x+5y. {x+y≥40 {2x+3y≥60 {x≥0 {y≥0 x = y = What is the minimum value? C=

asked by Anonymous on November 17, 2016
35. ## math

Paulo has \$6 to spend. A sundae costs \$3.25 plus \$0.65 per topping. Write and solve an inequality to find how many toppings he can order.

asked by andrew on June 24, 2014
36. ## math

Solve the problem. Make sure your answer is in simplest form and improper fractions are expressed as mixed numbers. A.6/12 B.6/35 C.7/35 D.7/30

asked by diego on October 17, 2015
37. ## Elementary Algebra

The perimeter of a soccer field is 280yd. The width is 5yd more than half the length. Can you help me with the formula to solve this problem?

asked by Wanda on August 5, 2012

Will someone please help me withthis question I couldn't solve it. What is the length of the segment whose endpoints are A(2, 3) and B(10, 7)? a)2 Sqrroot29 b)2 Sqrroot41 c)4 Sqrroot2 d)2 Sqrroot5

asked by Liz on June 19, 2012
39. ## Trigonometry

Solve for θ in the equation cos θ = -0.181 when 180º < θ < 360º. Round your answer to the nearest tenth of a degree.

asked by Mariah on September 30, 2014
40. ## Math

x2+y2+z2-x(al1+bl2+cl3)-y(am1+bm2+cm3)-z(an1+bn2+cn3)=0 solve this equation

asked by Ravi on October 25, 2017
41. ## calculus

find the absolute maximum and minimum of the function y=2cos(t)+sin(2t) on the interval of [0, pi/2] I have taken the derivative but I have no clue how to solve it for 0

asked by Kenneth on October 20, 2014
42. ## Calculus

Find an equation of the line through the point (3,5) that cuts off the least area from the first quadrant. How do I solve? I am stuck. The only thing I can come with is this: y-5=m(x-3) How to use this I don't know.

asked by Riley on April 22, 2009
43. ## math

Use a graphing calculator to solve the equation 3 tan=(1)/(3)è=8 in the interval from 0 to 2pi. Round your answers to the nearest hundredth.

asked by Torrance on May 21, 2013

How many kilograms of chlorine are in 24 kg of each of the following chlorofuorocarbons (CFCs)? 1) CF2CL2 express answer using two sig figs how would i solve for this problem??? thanks!

asked by ALISON on September 7, 2011
45. ## Science

Please drwls solve it for me two equal charges of magnitude 0.00000000032 is placed in an electric field. calculate the force of attraction between them

asked by Drift on November 5, 2012
46. ## Algebra

Rectangular court figure 99ft and 77 ft. Please help me solve this 99*77 7623? 99 plus 77 176? *sorry addition key isn't working*

asked by Malicha on February 5, 2017
47. ## Math

1. When four fan coins are flipped what is the probability of getting either exactly two heads of exactly two tails? 2. Solve for x 3x-x√3=-6 3. In the figure below ABCD is a rectangle and DE=DC. Given Ad= 5 and BE=3 find DE Thanks!

asked by Joe on September 6, 2011
48. ## Math

How to solve this problem? Here is what I have done so far. question --> 12(1/2)% x (1/2)/(3/4) First i solved the fractions (1/2) x (4/3) =4/6 I changed the 12(1/2)% into a decimal by solving 1/2, which is .5 which equals to 12.5 Answer is 1/12 but I have

asked by John on March 9, 2016
49. ## Analytic Geometry

Please help me to solve this problem. Find the equation of the locus of a moving point if the sum of the slopes of the line joining it to (1,3) and (4,-2) is 1.

asked by xavier on December 13, 2012
50. ## Math (ugh)

Solve the problem. Make sure your answer is in simplest form and improper fractions are expressed as mixed numbers. 3 3/4 x 2 4/5 = ?

asked by Anonymous on April 24, 2017
51. ## Chemistry

2H20(l) = 2H2 (g) +O2 (g) For the above, if 1.50 mg of water is decomposed, what mass of hydrogen is procduced? (1 Mg=10^6g=1 metric ton)? What is the answer and what is the best way to solve this?

asked by Carli on May 3, 2010
52. ## MATH

How do yoi solve 1+1=?????????? "WHAT?!!?" ummmmmmm don't u just put the 1's together... i think its 11. Thanks DUDE!!!! :') All this time I thought it was 2! :' ) Ha-Ha! How dumb was I. Welp; that's what I get for thinking.... :')

asked by LOP on January 18, 2007
53. ## Math - Algebra 2

I have tried several times to solve this. I have 3 points (0,-5), (3, -6), (-3,-7). I'm trying to get the quadratic equation. I keep getting y=(-1/6)x^2+ (1/6)x +0. When i plug in other numbers to check it's not the parabola facing down like my image.

asked by Jackie on December 1, 2013
54. ## Trigonometry

Solve each equation, giving a general formula for all of the solutions: a. 2sin^2(x)-5 sin(x)-3=0 b. (cos(x)-((sqrt2)/2))(sec(x)-1)=0

asked by Alex on March 28, 2015
55. ## Algebra

I have a math CRCT test today and I needed some help on a last minute review problem. Can someone please explain how to solve this? 1. 12x-3+6x-2=31 -MC

asked by mysterychicken on April 22, 2009
56. ## Chemistry

i am not understanding how to solve this how many moles of gas are present in a sample that is at 756 mm Hg pressure, has a volume of 5.3 L, and a temperature of 38 degrees C?

asked by Angel on April 3, 2013
57. ## chemistry (need by 5!!)

use the van der waals equation to calculate the pressure of 4.00 mol of H20 at 471K in a 4.60-L vessel. how do you solve?

asked by Katherine on April 26, 2013
58. ## math

The area of the figure is at least 400 square meters. Write and solve a two-step inequality to represent the possible values of x. Use 3.14 for 𝛑.

asked by Allen on January 20, 2011
59. ## algebra1

solve word problem zelma is eighteen years older than her son she was three times as old as he was one year ago how old are they now

60. ## Pre-Calc/Math

Use factoring, the quadratic formula, or identities to solve cos(x)+1=sin^(2)x. Find all solutions on the interval [0, 2pi)

61. ## geometry

Hi, could someone explain to me the steps I should take to solve the following problem. If radius BE is a perpendicular bisector of chord AC, then what is AB to the nearest tenth? BD is 7cm and DC is 9.

asked by ann on April 19, 2014
62. ## Math (pre-celc 12)

Solve this algebraically for the exact values (Meaning find the x-intercepts): (1/x)=x/(3x+18) I'm not sure what to write as the common denominator. I thought it was: 4x+18 because (3x+x+18)=(4x+18), but I'm not sure what to do from there. Thanks!

asked by Jana on May 17, 2016
63. ## physics

determine the tension in a cable needed to lift a 2000 kg elevator with an acceleration of 1.5 m/s.squared. How would you solve this? ): Which formula do you use?

asked by zianna on August 5, 2012
64. ## Math

Write and solve a proportion to complete the statement. Round your answer to the nearest hundredth. 90 lb ≈ kg I am having trouble even understanding how to do this?

asked by Meggie on January 21, 2016
65. ## Algebra 2

Using Equations The second angle of a triangle is three times the first and the third is 12 degrees less that twice the first. Find numbers for angles. I do not understand how to solve this equation.

asked by Kym on September 22, 2011
66. ## Physics help

How fast would you need to be travelling relative to an observer in order for them to see a 15% increase in your mass? How do I rearrange the formula to solve for v m = n/sqrt(1-(v^2)/c^2))

asked by Ryback on May 31, 2016
67. ## Chemistry

Calculate the molar solubility of Mg(OH)2 in the following solvents: (i) Pure Water (ii) 8.60×10−2M MgCl2 (iii) 3.70×10−2M KOH(aq) How should i solve this problem?

asked by Anonymous on April 8, 2015

solve for x, to the nearest degree, in the interval 0degres less than andequal to x greater than and equal to 360degrees. cos^2x=1 4cos^2x=1

asked by 123university on January 5, 2010
69. ## Math

How do you find the surface area of a rectangular prism though? I have (I think) the same question. 15mm = length | 3 mm = width | 4 mm = height. How do you solve it?

asked by Anne on April 18, 2018
70. ## Trig.

Can someone please help me with this? Find all solutions to the equation in the interval [0,2pi) cos2x=sinx I know I have to use some sort of identity, but I have no idea how to go about to solve this.

asked by mary on February 27, 2010
71. ## math

Evaluate (2.1 x 10^4) + (5.68 x 10^-2)Express the result in standard form. Can you explain your steps? I don't understand how to solve this with the negative 2

asked by Jessica on January 16, 2018
72. ## ethics

Who do you think has the greatest power to solve or prevent these dilemmas: organizational leaders, federal or state bodies, or society as a whole?

asked by Ann on September 25, 2008
73. ## pre-algebra

it says use equivalent ratio's to solve the proportion!!! ok is there a different way to do them kind of proportions because i did it like that yesterday and my teacher said they were all wrong Give an example of what you did and how you came up with your

asked by jaimmers on March 15, 2007
74. ## Calculus

How would I solve the limit for this sequence. [n^(2)]*[1-cos(2.4/n)] I used L'Hopital's rule by putting n^(-2) in the bottom, but I got the wrong answer of -1.44 in the end. Please help, thanks!

asked by Student on March 8, 2013
75. ## precalc/trig

Solve the Logarithmic equation algebraically. Give an Exact Answer and an approximation for x to four decimal places. 20 log(2x+2)=45

asked by Alexander on December 5, 2011
76. ## chem

what celsius temperature corresponds to absoulte zero? Kelvin = C + 273.15. solve for C when K = 0. You should use the same name when posting separate questions. how did ya figure that one out?

asked by Ann on May 30, 2007
77. ## Math

if the temperature starts at 0°f and drops 2 degrees an hour, how many hours would it take it to reach -8 °f? write a number sentence and solve.

asked by Yaya on August 29, 2016
78. ## Math

Use front-end estimation to estimate the sum to the nearest whole number. 13.40+36.63+125.042 How do I solve this question?

asked by Genevieve on April 3, 2018
79. ## Math

Mixed Rationals: Solve these question in two or three steps: 879 + 47/22 4591 - 133/61 -1 + 17/13 -68 - 18/7 -1297 + 763/512 Thank you!

asked by ANON on September 23, 2015
80. ## Math

Solve the following problem and convert to lowest terms (mixed number). 6 ⅚ – 17/18 (six and five sixths minus seventeen eighteenths)

asked by April on July 24, 2013
81. ## physics

Measure of two quantities along with the precision of respective measuring instrument is A = 2.5 m s–1 ± 0.5 m s–1 B = 0.10 s ± 0.01 s The value of A B will be (a) (0.25 ± 0.08) m (b) (0.25 ± 0.5) m (c) (0.25 ± 0.05) m (d) (0.25 ± 0.135) m please

asked by help me out it's urgent on August 16, 2012
82. ## math

Identify the rate, base, and amount in each statement or question. Do not solve the exercise at this point. 150 is 75% of what number?

asked by Anonymous on November 10, 2009
83. ## algebra

The formula for determining how long a hike will take is t=12(d+h) , where d is the distance in miles and h is the elevation gain in thousands of feet. Solve for h.

asked by Anonymous on October 5, 2017
84. ## Algebra

I am working on a review worksheet and there are 2 problems I can't remember how to do. Each question has 6 other questions, so helping me with these will remind me how to do the others! Thank you!! 1.2(x+5) = 1.6(2x+5) and Solve for y a(y+c) = b(y-c)

asked by Jeffrey on August 22, 2015
85. ## algebra

Can anyone tell me where I can go to find a better understanding on how to solve this type of problem: (-7,2); 3x=2y+9. what is the equation of the line is y=() simplify the answer using integers or fractions.

asked by Amanda R on September 8, 2010
86. ## Math

Hi. I am stuck on this question. List the subsets of the set: {5, 10, 15} What am I supposed to be doing? I just do not understand whatsoever. My book also was not much help, it just said the definition and not how to solve it.

asked by Anon on October 16, 2018
87. ## Math Help

I really need help on this. I tried doing it on my own, but, I got stuck. Thanks! (a) List any approximate x-intercepts values. (b) Set y = 0 and solve the resulting equation; y=x^3-4x^2-25x+100.

asked by Lori on October 10, 2014
88. ## Chemistry

How do you do this problem? Calcuate the mass of CuCl2*5H2O required for preparing 400mL solution that of .25M in chloride ions.

asked by Tiffany on October 11, 2012
89. ## Chemistry

Calculate the grams of solute required to make the following solutions. a)2500g of saline solution (0.90% NaCl (m/m)) b)0.050kg of 4.0% (m/m) MgCl2

asked by Kim on April 27, 2010
90. ## Chemistry

What quantity of NaOH should be dissolved in 15000l of water to obtain 4% concentration? proposed solution 4/100 * 15000 = 600

asked by Mankah on June 30, 2016
91. ## Chemistry

Which of the following substances would be expected to be the strongest electrolyte (best conductor of electricity) in solution with H2O as the solvent? 1. HF 2. BaF2 3. PCl3 4. CH3OH

asked by sara on February 23, 2014
92. ## chem

calculate the potential of a silver electrode in contact with the following: the solution that results from mixing 25ml of 0.05M KBr with 20mL of 0.1M Ag+

93. ## Chemistry

How many milliliters of pure acetic acid (density: 1.09g/mL) must be added to 500mL of 0.1M NaOH solution to obtain such a buffer?

asked by Troy Karl on May 1, 2019
94. ## analytic geometry helps are appreciated

Find the maximum value of y/x over all real numbers x and y that satisfy (x-3)^2+(y-3)^2 = 6. It is a circle, but how do we even begin? As a matter of fact, how is there not only like 1 solution?? No one has answered this question yet.

asked by Knights on March 1, 2013
95. ## AP Chemistry

Calculate the pH of a 75.0 ml solution containing 0.85 M lactic acid after the addition of 0.0225 moles NaL (assume a negligible volume change.)

asked by Davis on April 9, 2012
96. ## science

solubility product of Ca(OH)2at 25'C is 4.42*10^-5. A 500ml of saturatee solution of it is mixed with an equal volume of 0.4M NaOH .How muchb Ca(OH)2 PREcipited

asked by Bhupal Guragain on April 14, 2016
97. ## Chemistry 1202

calculate the Ph of the cathode compartment solution if the cell emf at 298 K is measured to be .6 V when Zn2+=.25M and PH2=0 .8 atm

asked by BMW on November 25, 2012
98. ## Chemistry

Given dry, powdered Evans Blue, how would you prepare 100 mL of a 500 mg/L stock solution using water as the diluent? I would appreciate any help, even just getting started. Thanks!

asked by Cassidy on February 10, 2014
99. ## math

the width of a rectangle is fixed at 4cm. Determine in terms of an inequality those lengths for which the area will be less than 92cm^2 the length must be less than ? cm the solution is {L|L< ? cm

asked by Anonymous on September 18, 2010
100. ## Algebra 2:)

f(x)=x^5-2x^4-2x^3+4x^2-3x+3 Approximate the irrational solutions correct to 3 decimals. If there is more than 1 real solution, enter them from smallest to largest, separated by a comma.

asked by Honey on May 17, 2012