# 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 577
1. ## Math

Using factoring to solve each quadriatic equation. 2x^2-5x-3=0. This is what I have so far but don't know what to do from here. GCF:1 A:2 B:-5 C:-3 AC:-6 Goal is the find two numbers that add to -5 and multiply to -6 Factors of 6: 1,6 -2,3 (That's the one)

asked by Carly on April 9, 2010

Yesterday your store earned $797.30just from the sale of cookies. Write and solve an equation that represents how many cookies were sold. asked by shelly on February 17, 2010 3. ## Math f(x) = 3x^2 , g(x) = 3x-1, and m(x) = 4x Find and simplify the composition function g(m(f(x))) answers i got which were wrong 3x-1(12x^3) 36x^4-12x^3 Maybe i am putting the information in incorrectly.. Should it look like this (3x^2(4x(3x^2))) then solve? asked by taylor on November 21, 2014 4. ## Geometry I having diffucltly with this triangle.This trangle angles are 3x,4x,x.You have to solve for x.I know you have to use the triangle sum therom.I got 7x=180.That would equal a decimal point which is not right.It has to be whole number. asked by Anonymous on July 4, 2011 5. ## Business Math Lance Lopes went to his bank to find out how long it will take for$1,700 to amount to $2,900 at 10% simple interest. Can you solve Lance’s problem? asked by Tonya on February 16, 2015 6. ## chemistry a) The OH- concentration of 0.050 M ammonia, NH3, is 9.5x10^-4. Write the equilibrium equation for its ionization and the equilibrium constant expression; solve for the value of K. asked by E.G. on March 30, 2011 7. ## chemistry The OH- concentration of 0.050 M ammonia, NH3, is 9.5x10^-4. Write the equilibrium equation for its ionization and the equilibrium constant expression; solve for the value of K. asked by Eghonghon on March 30, 2011 8. ## Algebra I do not understand this word problem at all. write an equation and solve. A rectangle has a length of x+6 units and a width of x-3 units. what is the perimeter in terms of x? asked by Anonymous on September 30, 2013 9. ## ALGEBRA 2 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= PLEASE, help me with this one problem I am stuck on! THANKS! asked by student on April 16, 2013 10. ## Algebra Maths A local company is hiring trainees with less than 1 year of experience and managers with 5 or more years of experience. Solve the inequality and graph the solutions? asked by Raman on October 1, 2013 11. ## math,trigonometry solve each triangle described below using Δ ABC : 1)a = 10, A = 16°, B = 49° 2)a = 8, b = 7, A = 88° I don't know how to do this i forgot ... could u help (Steve, or Mrs.Sue, or Writeteacher plz help) this topic is Oblique triangle asked by Anonymous on January 5, 2015 12. ## Math 29. Which of the following expressions should be placed in each set of parentheses below in order to solve the equation by completing the square? A. B. 3 C. 6 D. 9 The correct answer is D, but I need to learn how to do it and get the right answer. Thanks asked by Juan Nita 2 on December 25, 2016 13. ## Algebra Solve Find (f o g)(-6) when f(x)=4x+4 and g(x)=6x^2-3x-6. I originally came up with 918, but the answer is 916. Obviously I was close, but could someone tell how to get 916. I am studying for a test and am re-working my homework problems. Thanks. asked by Anonymous on March 29, 2008 14. ## algebra 1 who is correct and why? chloe jonas 3 asked by naomi on December 17, 2012 15. ## Precalculus Solve each exponential equation. Give answers as decimals accurate to the thousands place. 1) log(base5)14=2x-9 2) log(base7)5=7-6x 3) (1/3)^(3x+5)=(9)^(8-x) 4) 4^(x-5)=8^(x+2) asked by Ubon on December 1, 2015 16. ## Math Use a proportion to find the missing side length in the following similar figures. Both are triangles one is small and the other is bigger. The small is 4m and 2m the big one is 9m and you have to solve for x on it. A. x=4.5 m B. x=18 m C. x=8 m D. x=2.25 asked by Ams on January 18, 2016 17. ## math Solve the quadratic equation (2x+3)(x-3)=7. If there is more than one correct answer, enter your answers as comma separated list. If there are no real solutions,enter none. Please help!!!!! :( asked by Andrea on April 19, 2018 18. ## Chemistry What is the density of a copper block that is 8.96g/cm^3 in ounces/pint? I did all the conversions and the answer I got was 150ounces/pint? Is this correct? How to I solve this problem? asked by Megan on September 4, 2012 19. ## Maths I have already asked this question but I have to use my calculator to solve x^2 + 8x + 5 = 0 Someone gave me a link to a quadratic formula solver but when I enter it into my calculator I nvever get the right answer. asked by Remy on September 17, 2009 20. ## math the cost of the nelson family dinner was$54.95 at the restaurant.they want to leave a 20% tip for the server. which equation will solve for the total amount of the dinner

asked by Christopher on February 18, 2014
21. ## math

Eric and Frank want to equally share 4/3 feet of rope. What length of rope should each friend get? Explain how to use a drawing to help solve the problem.

asked by Mel on March 17, 2015
22. ## Math

The number 18 is multiplied by a number called "r". When 6 is subtracted from the product of 18 times r, the result is 54. Write the equation to solve this word problem.

asked by Dawnetta on October 19, 2009
23. ## quick little percent question

this is the only one on the paper i cant figure out... geh 2% of what number is 15? let the number be x so (20/100)x = 15 can you solve that little equation? I am sure you can finish it up. Is that 20% or 2%? taking a second look.... oops, sure looks like

asked by Adrienne on May 16, 2007
24. ## calc

Find the missing value: 1) log _____ = 1/2 Solve the equation, round to the thousandths place: 2) log8 - log(n-2) = 4log2 + log5

asked by summer on December 4, 2015
25. ## Algebra-I really need help, please?

I have to solve sqrt(2x-7) >=5 answers would be x>=16 x>=7/2 7/2

asked by Sarah on January 8, 2011
26. ## Trigonometry

Verify the identity. sin2x/cosx + sinx = 2sinx Solve for all values of x: 6cos2x-7cosx-3=0 If f(x)=cos1/2x-sin2x find the value of f(pi)

asked by . on April 20, 2010
27. ## Algebra

HELP! I am not sure how I would even start this problem or solve it. A hyperbola with a horizontal transverse axis contains the point at (4, 3). The equations of the asymptotes are y-x=1 and y+x=5 Write an equation for the hyperbola.

asked by Tessa on July 26, 2014
28. ## Physics

You hear a beat produced by 2 sources: 342.6 and 351.8 Hz. What is the period of the resulting beat tone? -- is there a formula for this? If so what is it and how do you solve the question?

asked by Justin turner on June 5, 2011
29. ## rational functions... PLEASE HELPPPPP

A rational function that passes through (0,0) and (4, 8/7) has the x-axis as a horiztonal asympotote. It also has 2 vertical asymptotes x=3, x=-3. I understand that to set it up, it is y= ax+b / (x+3)(x-3). I don't understand how to solve for a and b.

asked by luke on January 27, 2007
30. ## physical science

A baseball is thrown a distance of 20 meters from the outfield to 3rd base. What is the baseball's velocity if it takes2.3 seconds to get to the third basemen? How would I solve this?

asked by tay on October 11, 2016
31. ## math

If 10 points are arranged on a circle, how many lines are needed to join every point to every other point once? First solve simpler problems to determine a pattern.

asked by Anonymous on April 16, 2012
32. ## Math - Calc 2/Algebra

I'm trying to find the partial fraction decomposition of: 10x^2+2x-2/x^2(x+1) I already found B=-2 and C=6 Plugging in the numbers, I get: 10x^2+2x-2=Ax(x+1)+(-2)(x+1)+(6)x^2 How do I solve this for A? Maybe this is just some algebra that I'm rusty on. But

asked by Anonymous on June 29, 2017
33. ## math (simple interest)

Susan collected $1.20 interest after 6 months. What was the amount of her deposit if the bank pays 6% interest? Solve this equation: .06x =$2.40 the answer is 40

asked by Spencer on February 19, 2007
34. ## statistics

Build a 95% confidence interval for the mean of the population from the given sample data. Assume that the population has a normal distribution. 16.4, 15.7, 16.2, 15.8 17.1 15.8, 15.9, 16.0, 16.4 15.0 *please help me solve this! I have no clue what I am

asked by Sarah on April 29, 2014
35. ## pre-calculus

solve the following logarithmic equation. Be sure to reject any value of x that is not in thedomain of the orginal logarithmic expression. Give the exact answer. log3(x+8)=4 The three actually drops down a little below the g. Can someone tell me how to do

asked by ladybug on October 6, 2012
36. ## Math

If digits are not to be used with repetition, find the number of four- digit odd numbers divisible by 15 which can be formed by using 0,2,3,5,6,7, and 9? Answer: 30 The answer is 30, but I don't know how to get 30, please help me how to solve it🙏

asked by Natni on April 24, 2019
37. ## science

When you use a graph to solve a problem about how far a car traveled during a specified time during which it was accelerating, how many area caculations do you have to make? What is/are the shapes/shapes ou are calculating?

asked by mary on October 24, 2007
38. ## math

massimo has $90 in the bank. Every time he rides the buss he spends$2.50. write and solve an equation that massimo can use to see how many times he can ride the bus.

asked by nathan on June 14, 2017
39. ## Math

My question is “The line passes through the points (-4.5, 2) and (6.3, 5.8).” I have to create an equation in y=mx+b form for these points. Can someone please help me. I don’t know how to solve this, because I wasn’t taught it. Please just give any

asked by Someone help me pls on May 30, 2018
40. ## 8th grade

I am having trouble with these kinds of problems and I ask my teacher but he doesnt explain it good enough. Will you please tell me step by step instructions to solve this type of problem... -2(z + 11)=6 thank you

asked by Sara on September 23, 2008
41. ## rational functions

A rational function that passes through (0,0) and (4, 8/7) has the x-axis as a horiztonal asympotote. It also has 2 vertical asymptotes x=3, x=-3. I understand that to set it up, it is y= ax+b / (x+3)(x-3). I don't understand how to solve for a and b.

asked by luke on January 27, 2007
42. ## algebra 2

2X^4-9X^3+13X^2-X-5=0 Given that one root is 2+i, solve the equation. So far I have it set up like this: 2X^4-9X^3+13X^2-X-5/X^2-4X+5 I don't know how to get the answer, I know that I have to use long division but when I started to try it I kept getting

asked by Jessica on January 27, 2011
43. ## Algebra

Can someone help me with these two equations, I need to solve them by completing the square, I know the answers, (Number 1 is -11.56, 1.56, and number 2 is -10.35, 1.35) I just can’t remember how to get those numbers again, I have so much math on my

asked by Aaron on December 16, 2016
44. ## Algebra 2

I know how to graph points but I need the points to this equation. f(x)=(-x)^4+4x^2-2x solve by making a table of values. It says I also need the coordinates at which the relative maxima and minima occur.

asked by Kate on November 6, 2007
45. ## physics

A tiger leaps horizontally from a 15.0 m high rock with a speed of 7.10 m/s. How far (in meters) from the base of the rock will it land? so using the equation h=1/2 gt^2 and i put in 15 for h and g is 9.8 so i solve for t. is this right and when do i use

asked by j on February 14, 2012
46. ## alg 2

The book asks to us the quadratic formula to solve for the equation. Can someone help with these examples: 1.) x^2+4x-2=0 2.) 2x^2 -5x-2=0 3.) x^2+2x=4x 4.) -6x^2 +3x+2=3 ______________________________________ There are more problems but I think I can

asked by Kylie on November 12, 2014
47. ## College Algerbra

P=N/1+i is used to determine what amount of principle P should be invested for one year at simple interest rate i in order to have N dollars after a year. Solve the formula for i.

asked by Anonymous on November 2, 2015
48. ## algebra

What are the steps of the order of operations? Why is it important that you follow steps rather than solve the problem from left to right? Write an expression for your classmates to simplify using a least three of the following.

asked by Anonymous on November 23, 2008
49. ## Help with one limit

I'm asked to find the limit as n approaches infinity of : [(2^(n) +1]/ [2^(n+1)]. The review we were given has [1+ 2^(-n)] / 2 as the next step, but I'm not quite sure how to make that leap myself. The final answer is 1/2. How do you solve this limit?

asked by Anonymous on April 30, 2014
50. ## Maths

Thanks steve for a brilliant answer! Got one last one which is gobbledegook to me. Two functions f and g are defined by f:x(arrow)x^2 + 3 g:x(arrow)2x + 1 find: a) the function fg b)solve the equation f(x) = 12g^-1(x) Many Thanks!!!!

asked by Saud on November 21, 2012
51. ## Trigonometry

Solve the equation. (Find all solutions of the equation in the interval [0, 2π). Enter your answers as a comma-separated list.) 4 tan(2x) − 4 cot(x) = 0

asked by Thomas on February 27, 2019
52. ## Physics

Two waves, both of amplitude A, are traveling in opposite directions along a rope. What is the range of displacement y that the two waves may cause when they overlap? A. -2A ≤ y ≤ 2A B. -A ≤ y ≤ A C. -1/2A ≤ y ≤ 1/2A D. 0 ≤ y ≤ A (Honestly

asked by Kyu Q on December 29, 2018
53. ## Physics

Write a projectile motion problem with the initial condition vi=15 m/s at 50° above the horizontal. Solve this problem for ∆x, max height, and time of flight.

asked by Help on October 7, 2009
54. ## Chemistry

Given the reaction system; 2 NO (g) + O2 (g) -> 2 NO2 (g) Write a brief explanation for each of the following statements in terms of the collision model and/or reactions mechanisms. (1)Increasing the concentration of NO (g)makes the reaction go faster.

asked by Michael on January 27, 2011
55. ## Chemistry

Given the reaction system; 2 NO (g) + O2 (g) -> 2 NO2 (g) Write a brief explanation for each of the following statements in terms of the collision model and/or reactions mechanisms. (1)Increasing the concentration of NO (g)makes the reaction go faster.

asked by Michael on January 26, 2011
56. ## Math PLEASE HELP NOW

simplify the expressions... 1. (x^3)^5 2. (y^4)^5 3. 4^8/4^2(this is a fraction) 4. b^2/b^4(this is a fraction) 5. 28xy^7/32xy^12(this is a fraction) Please show me step by step because I am not really understanding these types of problems...

asked by PrimroseEverdeen on November 19, 2015
57. ## computer

You type in the value 56.4235 into the active cell. You then click Percentage Style Button. What will the cell show when completed? A 56.4235% B.56.4235% C.56.42% D.56%

asked by TB on June 19, 2013
58. ## Maths plz help

A test contain of 12 question out of which candidate are to answer 10.if the first 6 question are compulsory,in how many ways can each candidate select her question????? Plz show working

asked by Franklin: on October 20, 2015
59. ## Vector

Let 𝑎⃗ and 𝑏 be two vectors in the xy plane making angles 𝜃 and ∅ with the x axis, respectively. Use vector algebra to show that: cos(𝜃 − ∅) = cos 𝜃 cos ∅ + sin 𝜃 sin ∅

asked by HelpMaths on September 23, 2014

Jason has 20 coins that are only dimes and quarters. The total value is $2.75. How many of these are quarters? I tried answering it but I got 5 quarters. I'm not so sure if that's the right answer. Can you show me the equation and the right answer to see asked by Anonymous on September 18, 2016 61. ## Chemistry Lab Number of moles of HCl and Na2CO3 (show calculations) when 0.015 g of Na2CO3. How can I calculate this problem if I am only given the 0.015 grams of Na2CO3? asked by Julissa on October 3, 2016 62. ## Math An arithmetic sequence has a first term of 0 and a 10th term of 15. If 10 is an output of the sequence, which term number is it? Show and explain how you know you have the correct answer. asked by Candy on February 17, 2017 63. ## chemistry the density of a piece of wood is 0.638 g/cm3. The dimensions of the block of wood are 40.0 cm by 50.0 cm by 25.0 cm. What is the mass of the block of wood? Show all calculations. asked by sue on May 10, 2011 64. ## science I am doing a case study on MMR and MMR/Autism. The question I have been given is 'Does MMR cause autism?" Please can you suggest any websites etc. I need to find at least 5 sources to show for and against. Many thanks. asked by josie on May 2, 2010 65. ## math Tickets to a show cost$10 in advance and $15 at the door. If 120 Tickets were sold for a total of$1390, how many of the tickets were bought in advance?

asked by Rambo on January 30, 2012
66. ## Teacher aide

Which of the following equipment would you use to show a filmstrip to an entire class? A filmstrip viewer B filmstrip projector C videocassette recorder D movie projector Just want to know if I have it right. Is it B

asked by Karrie on April 26, 2011
67. ## Social Studies

How did the the Khmer civilization shape culture in Southeast Asia? Select all that apply. A. innovated a feudal system based on the loyalty of samurai warriors B. developed writing systems that spread throughout Asia++ C. used irrigation canals and

asked by dori on May 20, 2019
68. ## Math

Can you please helop with this problem? Solve this problem: -x/3 is greater than or equal to 2 Thank you

asked by JulieAnne on September 7, 2010
69. ## math

Connie has 18 and mae has 16 apple also. How many apple they have? Solve in four different ways.

asked by shirly on September 24, 2016
70. ## Maths

Let z1=2-i,z2=-2+i Find. Re(z1z2/modulus of z1) I only know that modulus of z1= 2+i I have no idea . how to solve this?

asked by Ash on June 21, 2017
71. ## math

dont know how to solve this equation but I have all the info. m= M + 5 log(d/10)=18+5 x log(5/10)=

asked by james on March 31, 2011
72. ## algebra

Solve the equation for cos(3theta/2).tan(3theta/2)

asked by saad on August 14, 2011
73. ## math

input output 10 12 15 22 21 _______ 6 4 29 50 _______ 2 how do i solve this problem?

asked by ty on March 12, 2013
74. ## College Algebra help!!!

I have to solve each equation using a u substitution and need help understanding how to do this. The first equation is: 1. x^2/3-2x^1/3-15=0 2. x+4=7 Squareroot x+4

asked by Kristen on February 4, 2013
75. ## Maths

31+x+31-x-10=0 Solve x2/3+x1/3-12=0 If (x-3)is a factor of x2+4x-21=0,find the other factor (using long division)

asked by Abigail on March 5, 2017
76. ## math

solve using set builder notation 5[3M-(M+4)]>-2(M-4) {m|m ____ ____}

asked by Jen on January 28, 2010
77. ## Math

Use Cramer's Rule to solve: 3x-5y=21 and 4x+2y=2. a=3, b=-5, c=4, d=2, e=21, f=2 21(2)-(-5)(2) divided by 3(2)-(-5)(4) =52/26= x=2 3(2)-21(4) divided by 3(2)-(-5)(4) =78/26= y=3 answer: (2,3)

asked by Jon on February 26, 2008
78. ## pre- algebra

solve and simplify 6 to the 4th power * 6 to the 2nd power

asked by john on February 10, 2011
79. ## Algebra 1B

How do I solve \sqrt{\frac{33xy^{3}}{\sqrt{3x}}}? I am getting so confused and I need help please!

asked by Laura on February 27, 2011
80. ## Algebra 1A

Solve for the missing piece of the equation and rewrite the equation. y = mx - 16 (17,8)

asked by James on March 31, 2011
81. ## maths

solve: tanx+tan2x+√3tanx tan2x=√3 (0

asked by rabin on January 2, 2017
82. ## math

please solve this for me.. i feel as if i am doing this wrong.. (1000/s-120)- (1000/s) = 1/2

asked by algebra on September 21, 2009
83. ## algebra

solve the equation by completing the square. 1) x squared-8x-4=0 2)x squared+7x=-12

asked by electra on May 29, 2008
84. ## govt college of tech

please help me to solve this question sec^2A+tan^2A=(1-sin^4A)sec^4A

asked by shoaib on April 30, 2014
85. ## Math

How would you solve: 5 cos x + 2 = 0 In the domain of 0 degrees to 360 degrees

asked by Paris on June 7, 2015
86. ## QUADRATIC EQUATIONS

How do i solve this, by factorizing... 4x(squared)-196=0 Example: 3x(squared)-12=0 (3x+6)(x-2) THNX

asked by Sam on October 15, 2008
87. ## math

How do i solve a set of equations that are set equal to eachother?

asked by Anonymous on February 15, 2018
88. ## Precalc with Trig

What value(s) of x from 0 to 2pi solve the following equation: cos squared x - cos x - 6 = 0

asked by Natalie on April 11, 2013
89. ## Math

write an equivalent equation that does not contain fractions then solve the equation 2/3x + 1 = 1/2

asked by Avis on February 5, 2017
90. ## Precalculus

solve the equation in the interval [0, 2pi) cos^2 x - cos x - 1 = 0

asked by Anonymous on September 7, 2018
91. ## Math

Solve the equation using order of operations. -22+105+(-37)+23+22+37+(-105)

asked by Annia on September 19, 2009
92. ## environmental science

What can be done to help solve problems about major problems in large cities?

asked by amanda on February 24, 2010
93. ## functions 12

solve 12cos^2X=8+13sinX between the window of -360 ¡Ü x ¡Ü 360

asked by kelly on May 8, 2012
94. ## geometry

if in a parallelogram ABCD, m angle b=8x-25 an m angle c=7x+55 how do i solve this probblem

asked by Mitchi montanna on December 13, 2010
95. ## Math

use the triangle and the give information to solve the triangle. a=, c=, find b, a, and B

asked by Sam on June 18, 2017
96. ## Math

Solve for X (8)^0(8)^x-4=512^X 8^0=1 512=8^64 8^x-4=(8^64)^x x-4=64x -4=63x -(63/4)=x Is this correct

asked by john on January 28, 2016
97. ## math

I don't understand how I am supposed to solve if i have something like (-7) to the power of -2... or 3/4 to the power of -1

asked by Cynthia on February 23, 2008
98. ## Math

Solve for x in the interval 0

asked by Nina on May 26, 2008
99. ## Algebra

Solve the absolute value equation. I I will represent absolute value I 2x-4 I -1= 11 Would the solutions be x=8 and x= -4?

asked by Anonymous on October 13, 2009
100. ## Geometry

Solve the proportion. x + 7/x + 4 = 7/x − 3 for x. a) What is the larger answer? b) what is the smaller answer?

asked by Chitra on November 27, 2009