# 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 451
1. ## Sin 4x

a.)Find sin 4x if tan=0.6 b.) Solve: sinxsinx/2=1-cosx(0

asked by Angela on July 26, 2010
2. ## Algebra

i try this one but graphmatica gives me different graph. Please help. Solve for y in terms of x and replace y with the function notation f(x). -2x + 5y = 9

asked by Eva on February 20, 2014
3. ## algebra

How do I solve for x on both sides of the equation, i.e. 72x+48=42x-12? Is there a standard way of figuring this out?

asked by Lost on December 6, 2010
4. ## Math

Solve (degrees): 3sin^2(x)-11sin(x)-4=0 It's just a quadratic but doesnt wprk?

asked by R on September 21, 2016
5. ## Calculus

Solve the equation (3^x)^2-12*3^x+27=0 Simplify and write without negative exponents: 3^2(x^-2y^3)^3/4^1/2*x^-4cuberooty^2

asked by Ana on July 15, 2012
6. ## english

Janet left fingerprints on the glass, the detectives were able to solve the crime

asked by tammy on March 27, 2011
7. ## plz help math

solve variation problem. if y varies directly as x and inversely as m^2 and r^2 and y=5/3 when x=1, m=2 and r=3, find y when x=3, m=1 and r=8

asked by Anonymous on February 24, 2012
8. ## Math

Solve for x: sec(2x)csc(2x) = 2csc(x) for 0 < x < 2pi [the first "

asked by Anonymous on November 14, 2009
9. ## rebus puzzle

What do the letters LIF mean They are written large and I need to solve for a rebus puzzle?

asked by kely on March 27, 2011
10. ## math

Solve the following problem. Round answer to two decimal places when necessary. I=240 W=1/3 A=1*W A=

asked by Samantha on July 2, 2012
11. ## Math

Solve for the positive value of x such that 3sqrt(x^2-4x+4)=16. The 3 is the small number next to the sqrt sign.

asked by Matt on December 4, 2014
12. ## math

Please explain in detail how to solve this problem: h = -16t^2 + 156t + 105

asked by Mary on April 14, 2012
13. ## Calculus

Find the limit as x approaches 1 5/(x-1)^2 I don't understand how to solve it because there would be a 0 on the denominator.

asked by Anonymous on November 30, 2014
14. ## math

The sum of the first 5 terms of a GP is 61. If the 5th term is 81 solve the value of the common ratio.

asked by john on April 12, 2017
15. ## Plane trigonometry

Hi, could you help me solve the one cycle graph and the 5 points of this equation: Y=2sin pi(x+1/2)+1 thank you in advance!

asked by Sam on May 1, 2016
16. ## algebra

how can i solve this equation: (a-b)(2a-b)(a+2b) can anyone be so kind to help me with it? p.s. I'm barely learning how to multiply polynomials.

asked by julissa on September 28, 2010
17. ## Algebra

How would i solve for this problems? also what is the answer(s) 5.)Which answers are equal to the expression √16 x √25 a.√41 b.√16 x 25 c.(16 x 25)^1/2 d.20 e.400 f.√25 x √16

asked by Clark on June 7, 2011
18. ## algebra

how can i solve this equation: (a-b)(2a-b)(a+2b) can anyone be so kind to help me with it? p.s. I'm barely learning how to multiply polynomials.

asked by julissa on September 28, 2010
19. ## algebra

Solve for the unknown:8/26=m/13 Complete the statement, using the symbol < or >. 12/19 ___ 0.625 ---------------- 8/ 2= 4, 26/2=13= 4/13 right?

asked by Mio on January 19, 2011
20. ## Geometry and Measurement

I am trying to solve the length of the hypotenuse of a right triangle with sides of 6mm and 8mm

asked by Victoria on February 29, 2008
21. ## Mathematics

Solve tan2x = 5sin2x Giving all solutions in the interval 0 ≤ x ≤ 180°

asked by Tony on November 18, 2015
22. ## Algebra II (check)

Assume that no denominator equals 0. (8y^3+27)/(2xy-10y+3x-15) I don't know how to solve this one.

asked by Jon on March 1, 2008
23. ## Math

Write this statement out as an equation and solve. Two thirds the sum of 30 and a number is 26.

asked by Pamala on July 4, 2012
24. ## Pre-Calculus

f(x)= 3+5cos pi/3 (x-7) If f(x)=4, solve for x. Find 1st 3 positive values. my answers: 2.31, 5.69, 8.31

asked by Anonymous on October 18, 2013
25. ## rebus

T H R O U G H The TRUG are in bold print. Solve ffor a rebus puzzle.

asked by kely on March 27, 2011
26. ## math

31. Solve the equation by completing the square. Round to the nearest hundredth if necessary. x2 – 6x = –8

asked by Tina on May 23, 2014
27. ## Algebra help pls

Which equation matches the statement: "The sum of -4x and 2 is 9"? A -4x+2=9 B -4x+9=2 C -4x(2)=9* D -4x-2=9 Solve. 1 ___ x = 12 3 A x=4 B x=15 C x=36 D x=39* Am i correct on these?

asked by Blaw on September 6, 2017
28. ## geometry

solve the riddle i am a polygon i have two right angles i have only one pair of parallel sides

asked by aqua on November 11, 2009
29. ## science

Explain why one must the absolute temperature scale to solve gas problems

asked by Anonymous on February 29, 2012
30. ## Check my answer? Math(:

Solve for x. 4(12)4x=1000 Enter your answer to the nearest hundredth in the box. x ≈ 1.9

asked by Leia on March 2, 2017
31. ## Maths

hello how do we convert a number into fraction for example : 1.75 = 7/4 0.111... = 1/9 .001=1/1000 how to solve that? please i need help! Thanks

asked by rebecca bhutto on December 12, 2009
32. ## Math

Can someone help me solve this question? I've read the book, notes, I still don't get it... Simply each of the following. a) n!/(n-1)! b) (n-r)!/(n-r-1)!

asked by Joey on February 22, 2011
33. ## math

what square number is less than 64 but greater than 36? write a multilication sentence to solve.

asked by carli on March 30, 2011
34. ## Math

There was an equation I was stuck on; 5x-3(x+2)=-12 solve for x. I tried working on it and got left with 5x squared is = to -6 but didn't know what to do after that? Please help

asked by Sonja on February 18, 2016
35. ## Maths trigonomentry

3cosx+4sinx=5 what is x is too difficulat form me to solve? Shw working please

asked by Collins on December 18, 2015
36. ## math

please help me to solve thank you binary addition 101 100 10 1010 1110 -----

asked by jessie on May 5, 2011
37. ## Algebra

For what real number k does 3x^2  k factor as 3(x  2)(x + 2)? Can someone please help with this question? I can not understand how it says to solve this in the book

asked by Jason on August 5, 2010
38. ## chem

What is the frequency of a photon resulting from the transition of n=6 -->n=1? for what atom. H? U? Na? If for H, use one of the next two or three posts to solve.

asked by Mary on October 2, 2006
39. ## trigonometry

(3^m)(5^(m+1))=12^(2m-1) not sure how to solve this but I think you use natural logs? I'm just stuck because the first two are multiplying and not adding and we didn't go over this

asked by Teddy on August 11, 2010
40. ## Trigonometry

use a calculator to solve on the interval 0 less than or equal to 0 < 2pi. 1. sin0 = 0.4 2. cos0 = 0.6

asked by Kay on September 25, 2007
41. ## Math (Answer ASAP)

To solve this problem, use the Pythagorean Theorem to find the third side. Cos=5/7

asked by Laya on December 2, 2014
42. ## Pre-Calculus

Solve for 0¡Üx

asked by Amy on December 12, 2009
43. ## Math

The amount 116 is 145% of what number? (Write the equation and solve it)

asked by Anonymous on September 10, 2009
44. ## Linear equations

Please help me solve this problem- Find an equation for the line perpendicular to 6x+2y=-2 having the same y-intercept as -4x-3y=6

asked by Joyce on October 8, 2011
45. ## Math

How does one solve this? A= LxW ;w This is exactly how it was written and I heard your supposed divide something but I don't know...

asked by Anonymous on November 28, 2016
46. ## Math

To solve this problem, use the Pythagorean Theorem to find the third side. Cos=5/7

asked by Laya on December 2, 2014
47. ## Math

Which linear technique would be best to solve this problem? 3x/4 + 6 = -12 And which quadratic equation would be best for -4x^2=0 Thanks for any suggestions.

asked by lyndse on December 12, 2009
48. ## Math

Solve the inequality -5x

asked by Anon on October 12, 2018
49. ## algebra

Use the distributive property to help solve the equation: 3(w-3)=-6 W= ??? I have 3w - 3*3 = -6 then I am lost, could someone explain the steps.

asked by Help on September 10, 2009
50. ## Algebra II

Solve: (1/81)^t=243^t-2 The book states to get the same base but I don't understand. Thanks for any help.

asked by Lucy on March 17, 2008

Write the ratio in the simplest form 16:24 A 1: 2 ***** B 4: 3 C 3: 4 D 2: 3 Solve for the following proportion x/2=8/9 A 144 B 0.44 C 1.78 D 36**** please help me

52. ## Algebra

Write an equation and solve. If 6 is added to twice a number,the result is 20.What are the numbers?

asked by Asia on March 10, 2016
53. ## Algebra

Suppose that x = 2-t and y = 4t+7. a. If x=7, what is y? b. If x=-3, what is y? c. Find y in terms of x. I don't know how to solve this, since x and y are in different equations. Could you please walk me through it? Thanks!

asked by Olivia on February 12, 2009
54. ## Algebra help pls

Which equation matches the statement: "The sum of -4x and 2 is 9"? A -4x+2=9 B -4x+9=2 C -4x(2)=9* D -4x-2=9 Solve. 1 ___ x = 12 3 A x=4 B x=15 C x=36 D x=39* Am i correct on these?

asked by Blaw on September 6, 2017
55. ## Maths

How do we solve for x and y where y=(1/3)log2(x) and 8^(2y-1) = 2(x-4) From the 1st one,I got x = 2^(3y) & by substituting it in the 2nd resulted 8^(2y-1) = 2((2)^(3y) - 4) How to proceed?

asked by Ash on March 11, 2019
56. ## trig

How would I solve this problem for t? 720 = 11.895+2.545sin [2pi/366(t-80.5)]

asked by anna on November 25, 2012
57. ## Algebra

Please guide in solving the following. I need the steps to take...in order to solve other similar equations. 28-4y=0

asked by MaryK on August 14, 2009
58. ## Precalculus

Solve sin(x) = -0.36 on 0 le x lt 2pi There are two solutions, A and B, with A < B and A and B in radians to 4 decimal places.

asked by marie darling on April 7, 2013
59. ## Algebra II

Hey all. I'm trying to solve this question, but don't really understand how to do it: If (x^4)^5 = x^a for all values of 'x', what is the value of 'a'? Any help is much appreciated, thanks!

asked by Anonymous on September 29, 2015
60. ## prealgebra

how do you solve this problem and can you help me please: wholesale price: \$13 and markup percent: 110% can u help please

asked by vick on February 22, 2012
61. ## math

solve the equations 10(-7x+15)=-410 -532=7(7x-13) 52+9x=178 -21=15+4x -168=-47+11x

asked by Diamond on May 30, 2013
62. ## Algebra

Solve for x. 4(12)4x=1000 Enter your answer to the nearest hundredth in the box. x ≈ 5.21

asked by lala on April 24, 2017
63. ## Algebra 1 (Reiny)

Write each equation in standard form. Solve by using the Quadratic Formula. 1. -7 = x^2 2. x^2 - 16 = 0

asked by Victoria on May 12, 2014
64. ## Pre-Algebra

how do I solve... 6/x + 3/ (I'm studying adding and subtracting mixed/improper fractions)

asked by |||Tris Prior||| on November 19, 2015
65. ## Algebra 1

Solve the equation by completing the square. Round to the nearest hundredth if necessary. x2 + 3x – 5 = 0 A.1.19, –4.19 B.–8.75, 5.75 C.1.66, 2.69 D.1.05, –4.05

asked by Chief4Keef5Sosa6 on March 1, 2018
66. ## Algebra

Solve the equation. Leave answer in simplest radical form. n^2-2n+1=5

asked by Elizabeth on April 18, 2013

someone please help i hav posted my questions like 5 times and no one is answering, can someone please solve these inequalitys 6y+16 b-5>-2 2y+1-10

asked by Julie on March 18, 2008
68. ## algebra

How would you solve this? I don't even know how to begin this... I know the answer is 4m^2 + 3m + 19 + (64/m-3) but I want to know how to do it incase its on the test. 4m^3 - 9m^2 + 10m + 7 / m-3

asked by Holly on December 10, 2009
69. ## algebra

Is there a link to a site where I can find a way to solve a Soma Cube, and where each shape would go? Thank you!

asked by Celina on December 22, 2008
70. ## sports puzzle

I have puzzle to solve on words from the world of sports.Do you know any web or side that can help .

asked by joseph on September 10, 2009
71. ## Geometry

how do you solve for endpinnts??? My teacher dosn't explain it good and I doon't get it. Help Please!

asked by Elizabeth on October 7, 2008
72. ## HELPPPPPPP (TRIG)

solve the equation 2 sec x- tan x = cot x for the interval 0 to 360 please:)

asked by HELPPPP on May 20, 2010
73. ## PreCalc

I'm not sure how to solve these with calculator. sec x = -2 , π ≤ x ≤ 3π sinθ=0.1473, 0°≤θ≤90° cosθ=0.7563, 0°≤θ≤90°

asked by Sam on March 23, 2011
74. ## Math

(4b^4+2) - (7b^2-5) - (6b^4-2b^2) How do you exactly solve/simplify this? I get confused with the signs when it comes to adding/subtracting terms like these. Thanks much!

asked by Nikki on September 20, 2008
75. ## Calculus

Solve without a calculator. cos(arcsin (3x/2)) I made a triangle but im stuck after that..

asked by Anonymous on March 29, 2015
76. ## Solving Percent Problems Using Equations Practice

I don't understand how to solve this problem. If you could tell me how to do it that would be great!! 48 is 30% of what number? 14.4 18 62.5 160

asked by Johnny McKarron is cool on December 15, 2015
77. ## algebra

solve polynomial equation by factoring 2x^3 - 12x^2 = 32x - 192

asked by john on December 3, 2014
78. ## maths

Please help solve for x A.7^x+(4)(7^x) =245 B.x-|x+20=0 C.1+3/(x+1)=x Simplify D.(|24 +2|6 + |54 / |96 - |6 Keys: |=square root, /over or divided by

asked by lebogang on February 17, 2015
79. ## math

i need help... i dont know hoe to explain this or how to solve it. Find the function rule: x= -2,-1,0,1,2 y= 9,4,-1,-6,-11

asked by Anonymous on March 6, 2017
80. ## alg 2 check?

1.)solve for n:-7n-21=-63 my answer: n=3 is this correct? please explain 2.)identify the x and y int for te equation 3x-4y=12.

asked by tyneisha on July 15, 2013
81. ## Algebra1

don't have a good teacher. need to understand how if can solve to figure out if this is undefined t-3/3-5

asked by Josh on November 10, 2009
82. ## english

solve this puzzle make two words you will have one letter left. aeeioumnrrstv

asked by jane on December 18, 2008
83. ## Algebra

Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth. x² – 21 = –4x • 7, 3 • –7, 3 • 7, –3 • –7, –3

asked by Sandra on April 4, 2014
84. ## Math

Consider the general quadratic equation ax^2 + bx + c = 0, where a is not equal to 0. Solve for x by completing the square.

asked by Annika on July 7, 2014
85. ## Calculus

With the following coordinates (16,46) (18,64) (20,60) create three formulas using Y+Ax^2+Bx+C then solve for A,B, and C to form the final equation.

asked by Hailey on December 3, 2014
86. ## Algebra

Double a number, add 1 to the product, and you get 29. whats the equation and how do i solve that. 2x+1=29 x=14

asked by Steve on January 20, 2007
87. ## math

PLEASE EXPLAIN HOW I CAN SOLVE MIXED NUMBERS PLEASE GIVE ME A EXAMPLE FOR PARTS THAT ARE SHADED THANKS

asked by Terence on March 12, 2008
88. ## Maths

Solve the equation 12xcube-8xsquare+kx+18=0 and find the value of k given that one root is negative of other

asked by Payal on August 18, 2017
89. ## math

How can you use a proportion to solve a percent word problem? Explain in your own words.

asked by Meg on November 22, 2009
90. ## math

Would you use mental math to solve 2984+1997+406? Explain?

asked by sandra on November 22, 2011
91. ## math

how do I solve this unit rate: \$11.49 for 3 pacages? I was absent, so I have no clue how to get the answer

asked by MIchelle on December 9, 2009
92. ## math

What are the equation on these 1. Determine the amplitude of y = -16 cos (x) 2. Determine the amplitude of = -sin (x) 3. Determine the domain of = -5 cos (x) 4. Determine the range of y = -10 sin (x) 5. Determine the period of y = -5 cos (2ðx) 6.

asked by Bernice on December 17, 2009
93. ## Business Finance

Using the FIFO method of inventory pricing, what is the dollar value ending inventory if there were 300 units on hand December 31? Auto Parts annual inventory of Windshield Wipers: January 1, Beginning inventory 300 units@11.00 March 15 Purchase 15o units

asked by Terry on January 22, 2012
94. ## Courts

Write a 1,100- to 1,400-word paper in APA format comparing the entertainment fiction of the court system with its reality. · Select examples from fictional portrayals of the courtroom found in books, movies, or television; for example, The Runaway Jury, A

asked by Katie on April 27, 2010
95. ## chem

hi can anyone help how do i determine the molecular formular of the oxide of arsenic in its in its gaseous state the answer i got was 17.8 gl -1 for the density, which law do i use is it boyles law or charles law thanks A mol of a gas occupies 22.4 L at

asked by bex on February 3, 2007
96. ## biology

any type'a study to work on this stuff? I just need to memorize it in order 2 get it 'cuz I don't forget and not answer it correctly. any type'a study to work on this stuff? I just need to memorize it in order 2 get it 'cuz I don't forget and not answer it

asked by Henry on September 3, 2005
97. ## math

3(4u-6)=2(4u-3)-(u-8) what is u 12u-18=8u-6-u+8 Can you take it from here? so I would have combine like terms then add right? what about 3(n-2)-2(3-n)=4(n-3) same thing...use distributive property to multiply, do the operations, solve for n give it a

asked by nyaja on September 25, 2006
98. ## Business Math

Using the FIFO method of inventory pricing, what is the dollar value of ending inventory if there were 300 units on hand on December 31? Annual inventory of windshield wipers January 1 Beginning inventory 300 units@11.00 March 15 Purchase 150 units@10.50

asked by Terry on January 23, 2012
99. ## biology

A researcher wanted to know how many fish were in a dam.He caught 20 fish and marked them by clipping out a small section of their tail fins.He then released them back into dam.A few days later he caught 25 fish and found that 8 had been marked 1.estimate

asked by jeremy on October 16, 2015
100. ## Chemistry

What is the pH of a 0.77M solution of methylamin at 25 degree C? CH3NH2, Kb= 4.4X10-4? How do I set this up to get the answer?

asked by George on March 7, 2013