# 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

92,096 questions, page 567
1. ## math plz help ;-;

Solve the following equation: -2(x-3)+4=8x-20 please help me how to do this step by step plz i do understand how to do this, sorry ;-; And thank you for the ones the helped me with the other Q :D

asked by leo on May 30, 2016
2. ## math

Write the quadratic equation in general form. Do not solve the equation. x(x + 3) = 4x^2 + 4

asked by Anonymous on February 4, 2019

I need someone to explain how to solve equations with two variables and tell me what the formula or equation is? Please help and explain. Thank you!

asked by saranghae12 on March 1, 2012
4. ## Math--algebra 2

Hello! I'm trying to solve these two questions-- |x-4|5 and I'm not exactly sure how to answer For question 1 I got this- 1

asked by IhaveaQ on July 28, 2017
5. ## Math

Solve the equation sin2x=2cos2x, for 0 degrees

asked by Charles on January 14, 2013
6. ## intermediate algebra

solve each equation and check the result 7 3 40 x-5 - x+5 = x^2 - 25 there is a line in between each equation how would i start something like this?

asked by jennifer on September 22, 2008
7. ## ALGEBRA

the arithmetic mean of two numbers exceeds their geometric mean by two. find the numbers if one is 40 less than the other? help me please to solve this...

asked by CASS on June 20, 2015
8. ## Maths

Solve the quadratic equation 2x² - 4x + 1 = 0 How many solutions are in the equation 3x² + 4x - 7 = 0

asked by Jo on May 1, 2018

Explain if a triangle with the given lengths is a right triangle. 1. 18, 24, 30 2. 7, 24, 25 3. 13, 14, 15 I really do not know how to solve these problems! I have no idea how!!!! Please help!

asked by Delilah on October 17, 2012
10. ## math

Write a compound inequality containing the word or solve and graph your inequality

asked by Erica McDonnell on October 5, 2018
11. ## Math

need help with Equations: I don't understand what 4x-2x+4=x+10 I don't have a clue how to solve and check it. please help me

asked by Glenda on December 17, 2007
12. ## math

cosxtanx-sin^2x=0 solve for x over the domain 0 is less than or equal to x which is less than or equal to 2pi

asked by lilpump on October 29, 2017
13. ## Calculus

How do I solve lim(x-->pi/4)(sinx-cosx)/cos(2x) The (x-->pi/4) goes below the lim. Should i just substitute the x's with pi/4??

asked by Alex on February 21, 2009
14. ## math

Solving Equations with Fractions 3m/5 - 1/2 = 7/10 solve for M i need a step my step process. i need help.

asked by nain on July 12, 2012
15. ## algebra 2

I need step by step directions on how to solve examples like this one. 2x^-13x-7=0 Thanks in advance for the help

asked by tony on June 1, 2008
16. ## math

solve sinx/2,cosx/2 & tanx/2 of the following:- (a)sinx=1/4 & x lies in second quadrant.

asked by Abhijit on April 8, 2015

Find the equation of the line that contains the point (3, 2) and is parallel to the line 3x − 9y = 0. I know I solve for y and I get y= -3x/-9 but I am not sure where to go from here please help.

asked by Erica on December 5, 2014
18. ## math

solve 3/2x-3=5/2x-5 3(2x-5)=5(2x-3) 6x-15=10x-15 minus 6x to both sides -15=4x-15 add 15 to both sides 0=4x 0/4=4x/4 x=0 Is this correct?

asked by Elle on October 19, 2013
19. ## Trig

Solve: cos2x(2cosx+1) for 0degrees is less than or equal to x is equal to or less than 360degrees

asked by Tabitha on January 20, 2011
20. ## Math

How do I solve: sqrt(3)tanx= I need to use the identity tanx=sinx/cosx Thanks

asked by Bob on February 25, 2012
21. ## Math

If there are 24 books on a shelf and 2/3 are fictional, how do I solve to to find out the number that are fictional

22. ## aig

Please solve. Use order of operations. 320-(17+3)-5 = My answer is 323, am i right or not? if not please tell me your answer and how you got it.

asked by May on November 11, 2012
23. ## Math

Solve the inequality: 2x-1 / 3x-2 < 1 [the < is actually less than or equal to] I got one of the answers, x is less than or equal to 1, but there's another. How do you find that answer? Thanks

asked by Trixie on February 4, 2010
24. ## surveying

how to solve for radius of horizontal curve with coordinates(NE) for points A,B, C on the curve

asked by Stacey Graham on July 6, 2010
25. ## Math/Trig

Solve: sin2 x = cos2 x for 0 degrees is less than or equal to x is less than 360 degrees.

asked by CJ on January 20, 2011
26. ## Algebra

How to solve this problem √363−3√27 Need step by step instructions. Thanks, Kaai97

asked by Kaai97 on May 3, 2016
27. ## Algebra: HELP

Solve for x: x + 6 = 5(2x - 2) Answers to choose from, these are all fractions. A. 8/9 B. 16/9 C. -4/9 D. -14/9 Can someone please help me with this because when I saw the fractions I completely freaked!

asked by Cheryl on February 18, 2011
28. ## Algebra

Let x = log_2 1/8 Write the exponential form of the equation and solve the equation for x.

asked by Pamela on August 5, 2009
29. ## algebra,math

Solve the equation. 4 times the square root of x minus 5 minus 8 = 12

asked by tracy on October 24, 2011
30. ## Geometry

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck

asked by Kate on April 5, 2011
31. ## math

Use the rule of Logarithm, then solve for x Log 2x+1 - log (x+5)=0 x=4 *I know x equals for can you explain how?

asked by dj on November 20, 2008
32. ## math

-6 is given as a fourth term,-34 is a eleventh term what are the first three terms?can i solve it simultaneously

asked by mbali on January 14, 2016
33. ## math

how do i find (d^725/dx^725)(sin x) is this a derviative problem? can someone help me solve it?

asked by sammi on October 15, 2009

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck

asked by Rosie on April 5, 2011
35. ## Algebra

Write the exponential form of the equation and solve the equation for x Let x = 1og_2 1/8

asked by Shelly on August 2, 2009
36. ## Algebra

How do you solve for x in this problems?? bx-2=10 x/2+e=9 5x+e=9 These are rather trivial. I will do one. The second: subtract e from both sides, then multiply both sides by 2.

asked by K on January 18, 2007
37. ## Pre-Cal

solve cos 5 thetha cos 15 -sin5theta sin 15 =squareroot of 3/2 Thank you

asked by Amy on December 23, 2009
38. ## advance functions gr 12

Using rational functions solve x+5(numerator) x-3 (denominator) = 2x+7 (numerator) x(demominator)

39. ## science(physics)

given vectors , Vector a= 2i + 3j, then the angle between vector a and y axis is? Plz solve

asked by marley on June 10, 2011
40. ## math trig

a triangle abc has a mearsure of an adjacent 15 and 25 degree solve for the triangle

asked by mier on March 19, 2014
41. ## geometry

Solve for the value of y and the measures of angles 1 and 3. m angle 1=(10y+2) m angle 3=(12y-8)

asked by sarah on October 6, 2010
42. ## math

Solve for x: sin3x=1/2 Can someone please help me with this porblem? I'm not sure if my answers are right, but I obtained x=ð+12ðk/18 and x=5ð+12ðk/18.

asked by Veronica on January 6, 2010
43. ## Math advance functions gr 12

Using rational functions solve 7+ 1(numerator) x (denominator) = 1 (numerator) x-2(demominator)

asked by alex on April 1, 2013
44. ## advance functions gr 12

Using rational functions solve 7+ 1(numerator) x (denominator) = 1 (numerator) x-2(demominator)

asked by james on April 2, 2013
45. ## Geometry

If one angle is 2x+y and the other angle is 10x-4y how do you solve it? They are both right angles. Do you set them equal to each other?

asked by Bryce on September 25, 2012
46. ## advance functions gr 12

Using rational functions solve x+5(numerator) x-3 (denominator) = 2x+7 (numerator) x(demominator)

Solve w= (va)/(r^2+a^2) for a. I applied the quadratic formula a= (v/w +- sqrt (v^2/w^2 - 4*(-wr^2)) /2 and I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w

asked by Shawn on November 10, 2008
48. ## Math Algebra check please

Solve w= (va)/(r^2+a^2) for a. I applied the quadratic formula a= (v/w +- sqrt (v^2/w^2 - 4*(-wr^2)) /2 and I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w is this right?

asked by Shawn on November 10, 2008
49. ## maths

express log9 in terms of log3 x and log3 y and solve for x and y simultaneously

asked by Jonathan on January 21, 2017
50. ## Pre Algebra

Solving part of a part. How do you use thermometers to solve fraction problems?

asked by Luke on September 1, 2009
51. ## Algerbra

7.f(x)=2x^2-3x+1 13. f(x)=x^2-6x+1=0 *Solve for the zeros/roots of the following quadratic equations by using the quadratic formula* Any help please.....

asked by Kayla on May 22, 2017
52. ## math

solve for cos^2x=secx note: cos square root of 2 x.

asked by emily on April 27, 2019
53. ## Pre-Calculus

Hi! I'm having trouble with this math question; can someone help? Thanks! :) Given the function f(x)=x^2+9, solve. a.) Find f(-3) b.) Find f(x-2)

asked by Tiffany on September 16, 2014
54. ## Trig

Solve for t algebraically: inverse cos(t) = inverse sin(t). Where do I start?

asked by Anonymous on February 6, 2017
55. ## linear analysis

how do i solve for y(x) if dy/dx=x+y and y(0)=1 I know the answer is y(x)=2e^x-x-1 I posted this question before but i can't find my question so i would appreciate if you helped me again.

asked by jen on August 20, 2008
56. ## math (trigonometry)

help me solve this coz im stumped secx-secx sin^2x= cosx thanks

asked by Kakashi on January 11, 2009
57. ## Algebra

If a function is given and it asks if a point is on the graph. How am I supposed to solve this? Like for example: f(x)= (2x)/(x-2) point: (1/2,-2/3)

asked by Amy on October 18, 2010
58. ## math 116

Translate. Let x represent the unknown number. Two more than four times a number is the same as six. The way I would solve this would be: 6=2+4x 6-2=2+4x-2 4=4x 4/4=4x/4 1=x is this right?

asked by meshelle on January 19, 2009
59. ## Math Precal/Trig

Solve for n. 7((1-(-3)^n)/(1-(-3))=3829 I was confused on distributing the number 7, because we've always had problems with the number 1 on the outside.

asked by Samee on September 18, 2014
60. ## math

Hi I Have A Question About Rolle's Theorem Why We cant solve [ F(x) = abs(x) ] ? *abs = absolute

asked by jack on December 10, 2011
61. ## Chemistrt

I'm unsure of how to rearrange Balmer's equation to solve for n2. The equation is 1/lambda= R(1/2^2-1/n2^2)

asked by Kelsey on May 27, 2017
62. ## math help pls pls

How do you solve the formula for the perimeter of a rectangle with width W and L length for the length p=2w+2L

asked by Oscar on March 1, 2016
63. ## Precalculus

How would you solve this trig function: cos2x=sin^2-2 how do you know what trig identities to use?

asked by Jess on August 6, 2011
64. ## Pre-cal

1) Solve the equation sinx(sinx+1) = 0 I am having trouble with the first step. Could I do sin x^2 + 1 =0?

asked by Abby on February 23, 2010
65. ## math

I know you have to group this problem but I'm not sure how to solve this, if someone could step by step I would appreciate it. 6x^3 +14x^2-27x-63

asked by pam on September 1, 2015
66. ## Algebra

Can you please help me solve: Fifteen less than twice some number is 115. 15 - 2x = 115 is this the correct equation? thank you

asked by Rachel on August 24, 2015
67. ## physics

x=x0+v0t+1/2at^2. Assuming that x0=0, a=2, and x=h, solve for t in terms of initial v and h? x0 mean initial value of x same with v0

asked by Joseph on June 8, 2012
68. ## AP math

how do I solve this? 0.02e^-0.244t=0.06 I know I divide by the constant to get : e^-0.244t=3 but I'm not sure what to do after. do I take ln of both sides?

asked by Anna Santiago on April 19, 2017
69. ## Algebra

When factoring an equation, how do I know if the result is prime? For example, I have a problem x^2 - 2x + 4 and I think it is prime because I can't solve it. Am I right?

asked by Mary on April 1, 2013
70. ## math

solve for x by writing the equation in exponential form: log sub 4 x=-2 log sub 5 (2x + 1)=2

asked by anonymous on March 3, 2011
71. ## Solve

Solve 1/C=1/C1 + 1/C2 for C1 This multiple choice and the listed answers are: a.)C1= CC2/(C2-C) b.)C1= C-C2/C c.)C1= C+C2/CC2 d.)C1= C+C2/C2

asked by Shawn on October 12, 2008
72. ## math

y=x^2e^x I am suppose to find the dy/dx of this the way i did it was x^2e^x times dy/dx of x^2 and got x^2e^x times 3x^2 this is not right and im confused on how to solve it help pls.

asked by sonia on August 12, 2009
73. ## Math

Solve the equation. Start Fraction y minus 5 over 3 End Fraction= 1 A. –2 B. 8 C. 18 D. 6

asked by Anonymous on December 18, 2018
74. ## Trig

Solve equation for 0 less than or equal to theta less than 360. 3-1/5*tan(theta)=16/5

asked by Sally on January 24, 2017
75. ## Algebra

Write a story problem that is associated with this proportion, then solve the problem. 15/16= n/100

asked by Chey on March 13, 2018
76. ## Math

Please help me with the following by checking it. Solve for x: √(2x^2+5)=2 A. ±1 B. √2 - (This is my answer.) C. ±2 D. None of the above. I am not sure about my answer, can someone check it please. Any help will be greatly appreciated.:)

77. ## Math

The sum of two numbers is 94.6. If one number is 19 times the other, what are the two numbers? Please explain how to solve. Thanks

78. ## math

Me and my mom are having an agrument about how to solve this problem. 27 / (5+4) * 19= she says the answer is 57 and I say the answer is 6 with a remainder of 9..can you please tell me who is right. Thank you.

asked by Lizzy on October 21, 2009
79. ## fractions

if there are 648 meters vertically and 4/8 by 6 meters horizontally. how do i solve the problem?

asked by brandon on March 14, 2011
80. ## Math--Proportions

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck

asked by Lily on April 5, 2011
81. ## Algebra

Solve 2+y/7+5=4+1-y/7 for y. Book says the answer is y=-7 How can this be the answer when the y/7 can each other out when you simplify? 7+y/7=5-y/7 -7____-7 ___________ y/7=-2-y/7 This is what I come down to.

asked by G on June 12, 2009
82. ## Math

Solve the linear equation using any technique you have learned. Name the technique. Check. 3x + 12 = -7x - 28

asked by Crystal on February 20, 2010
83. ## Math

Using the numbers 4, 9, 36 ... What is the sequence that I would put these numbers in to solve the equation ? - ? : ? Equals zero

asked by Lilly on September 30, 2010
84. ## Math

Solve sin θ = 0.95 for -90º ≤ θ ≤ 90º. Round to the nearest tenth.

asked by Quinn on November 29, 2018
85. ## geometry

Which equation is the correct equation to solve for x? Given ST = 5x + 1 , TU = 4x -1, and SU = 54 Its multiple choice and the answers given are- A)(5x + 1) + 54 = 4x - 1 B)(4x - 1) + 54 = 5x + 1 C) 5x + 1 = 55 - 4x D) 5x + 1 = 27

asked by Sid on August 26, 2013
86. ## Geometry

The area of a rectangle is 25. The lenght is 1/2 of the width. Please help me solve for length and width.

asked by Sue on August 24, 2014
87. ## Math

26. If , what is ? A. B. 5 C. D. 3 The answer for this question is C. I need to learn exactly how to solve it (step by step) so I can do it on an exam. Thank you.

asked by Juan Nita on December 25, 2016
88. ## ALGEBRA

how do i solve this linear equation: 3x/4 + 6 = -12 (3x over 4 is a fraction) and this quadratic equation..... -4x squared = 0??

89. ## algebra

Solve the pair of simultaneous equations log(x+y)=0, 2logx=log(y-1)

asked by Matteo on November 3, 2010
90. ## Fraction

We solve fraction left to right or right to left. Eg. 3/4+1/5-4/4 I mean asked does we have to do addition first or subtraction.

asked by Shan on August 24, 2012
91. ## math

Can you solve this problem for me? Nina has twice as many nickels as dimess. In all, she has 70¢. How many nickels and dimes does she have?

asked by angelab on April 30, 2014
92. ## English

I forgot to add these sentences. Thank you very much. 1) The rise in population caused an increase in the demand for clothes. As more energy was needed to drive machinery, the steam engine (power?) was introduced (developed?). 2) The introduction of the

asked by Henry2 on July 4, 2011
93. ## science

A weightlifter lifts a weight of 500N from the ground over her head, a distance of 1.8m. How much work has been done to move the weight?

asked by shauna on July 15, 2019
94. ## physical science-asap

If you perform 10 joules of work lifting a 10-N box from the floor to a shelf how high is the shelf? a. 1 m b. 2 m c. 10 m d. 100 m

asked by a'ny on February 23, 2018
95. ## English

Identify and list one error in the sentence below: The two boys were was playing soccer. Error: was Please check my work.

asked by Tim on July 30, 2016
96. ## english

What does frivolity mean in this sentence After a year of serious work, Mr. David's grade 8 class enjoyed the frivolity of a party.

asked by sarah on September 13, 2015
97. ## Physics

An engine has an efficiency of 59% and produces 5300 J of work. Determine each of the following. (a) the input heat J (b) the rejected heat J

asked by Kiante on April 19, 2008
98. ## Science

A boy on a bicycle drags a wagon full of newspapers at 2m using 80N force. How much work has the boy done?

asked by Anonymous on July 15, 2019
99. ## science

a box of cleaning supplies weighs 15 N. if the box is lifted a distance of 0.60 m, how much work i sdone? A)0.040 J B)9 J C)14 J D)25 J

asked by little kakashi hatake on February 2, 2017
100. ## physics

An object of mass m=2kg travels up an incline to a vertical height of 3m. What is the work done on the object by gravity?

asked by derek on November 3, 2010