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 566
1. 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

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
3. 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
4. Math

how do you solve this I keep trying and I keep getting the wrong answer. I keep getting x=19000 and that is not correct .10=.9(x/15000)+.14[(1-x)/15000]

asked by Britt on April 19, 2009
5. Algebra

Write two different inequalities that you can solve by adding 2 to each side and then dividing each side by -12.

asked by Zero on November 12, 2015

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
7. math/algebra

solve the compound inequality. 2x-7 / 6 is less than or equal to -7, or 2x-7 / 6 is greater than or equal to 5 I came up with -35/2 or 37/2 but it's incorrect. help?!!

asked by jan kopelman on July 26, 2010
8. math

Solving Equations with Fractions 1/2 x - 1/3 x = 7/3 solve for X i need help step by step process anyone?

asked by nain on July 12, 2012
9. 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
10. 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

11. 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
12. 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.:)

13. check my precalc

#1. solve x^2-120 I got (-infinity, -4) U (5,infinity) #3 what is the domain of this function? f(x)= squre root of (x-3x^2) i got [-1/3,0] thanks!!!

asked by rebekah on October 1, 2012
14. 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
15. Maths Problem

Please help me to solve this.... The average of two numbers is 81. The difference between the number is 26. What is the smaller number?

asked by Sarah JJ on January 31, 2015
16. algebra

If you bought 24 cards for \$50, one card is \$1 each and he other card is \$5. Write an equation and solve.

asked by mariah on February 26, 2013
17. 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
18. 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
19. 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
20. algebra

Solve the equation|2x+10|>26 answers are x16,, x>-18or x

asked by Molly on February 20, 2014
21. Trig

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

asked by Anonymous on February 6, 2017
22. MATH

solve for theda given 0

asked by ROBIN on July 15, 2013
23. Algebra 2

1)Solve: (1/5)^(t-2)=125 (1/5)^(t-2)=125 (1/5)^(t-2)=5^3 (1/5)^(t-2)=(1/5)^(-3) equate the powers on both the sides. we obtain..... t-2=-3 t=-3+2=-1 t=-1

asked by Jon on May 20, 2008
24. math

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

asked by emily on April 27, 2019
25. 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
26. Math

Solve -4x is less then equal to -16. I got x is less then equal to 4. Is this correct I'm kind of confused with this question.

asked by Alan on November 17, 2013
27. math

solve the inequality. explain each step and identify the property used for each step. 5z >_ -75

asked by nicki minaj on October 31, 2017
28. Math

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
29. algebra

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

asked by Matteo on November 3, 2010
30. ALG 2!!!

5 to the second power minus 4 times 4 plus 5 to the second power equals what? it should look like this kinda 5^(2)- 4 x 4+5^(2) please solve

asked by tyneisha on October 17, 2012
31. math

9. solve |4x + 3| = 9 + 2x and check for extraneous solutions. the first answer I got was: |4x +3| = 9 + 2x |4x| = 6 + 2x 2x = 6 x = 3 can someone help me find the other answer? thank you!

asked by emily on May 12, 2016
32. Math

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

asked by Quinn on November 29, 2018
33. 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
34. 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
35. math (trigonometry)

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

asked by Kakashi on January 11, 2009
36. Algebra

Solving inequalities with both multiplication and addition 4(x-3)-2< 3-5(x+7) Can someone take me through this step by step? I do want to solve it on my own. Thank you

asked by Diana on September 29, 2009

solve for the variable ã(square root) ãy+6 - ãy = ã2 would i square both sides first? im stuck

asked by lyne on December 8, 2008
38. Algebra 2

Can someone help me solve this problem please? The directions are to simplify the logarithm: log5(a + 2) + log5(a – 2)

asked by Jerome on December 2, 2015
39. geometry

angle xoz (5m-5) angle yoz (7m+29) these are supplementary angles. How do you solve?

asked by D on January 4, 2013

1. Find 5A-3B. A=[6 -5 8], B=[7 5 -6] [5 -4 3] [4 3 -4] 2. Solve the matrix equation. [3 -1] - x=[-2 3] [2 5] [1 -6] 3. Given A=[1 -1 2] and B=[-1 -3 2], [3 0 5] [2 4 5] [0 2 -2] Find AB. 4. What is the inverse of [-100 -25]? [-5 -6]

asked by Kirston on May 6, 2014
41. Math

solve: (square root of 3) sin(theta) + cos(theta) = 1 Thanks! :)

asked by Bridget on October 21, 2010
42. 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
43. 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
44. Algebra

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

asked by Kaai97 on May 3, 2016
45. Algebra II

Solve the inequality: 3[m-4]>6. []=the straight lines indicating inequality. Thanks for the assistance.

asked by Lucy on October 25, 2007
46. Math

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

asked by Tim on January 17, 2010
47. Algebra

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

asked by Kaai97 on May 3, 2016
48. 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
49. 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
50. 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??

51. 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
52. trig

how do you solve 2nd cos 6/11 (my calculator doesn't have 2nd function0

asked by dolora on May 1, 2011
53. 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
54. Physics

A ball is thrown straight down with a velocity of 12 m/s; what will be its velocity 2.0 s after being released? Please help me solve this!!

asked by Student on September 25, 2016
55. 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
56. Calc Help :(((((

Solve it step by step so I can't do the rest. lim x->-infinity (ax^2+b)/(cx+d) Thank you! Answer th

asked by Kris on February 23, 2014
57. maths

quadratic equation solve the equation by factorization 27x^2 - 126x = 0 So x=? or x=?

asked by gean on August 1, 2013
58. Math

Can some one help me solve this please. 2e^5x = 712 log5 80= the five is little next to the log and 2logx=log(6x-90)+1 thanks I would really appriciate it if you could help me out

asked by Mike on December 1, 2008
59. 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
60. Math

can you help me on this problem;; here is the problem, solve the equation. remember to gater like trems. FIRST!! k-5 / 6 = -7 ?

asked by Taylor on January 8, 2008
61. 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
62. 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
63. algebra,math

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

asked by tracy on October 24, 2011

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
65. Algebra

Solve the linear equation: -10.8x + 1.4 = -47.6 - 1.0x If you could do step-by-step so I may learn this it would be appreciated. Thank you!

asked by Janey on May 1, 2011
66. Decimal division

If you were going to solve 0.7 divided by 0.0035 what would you write down on paper step by step?

asked by Kenneth on March 1, 2012
67. 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
68. 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
69. 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
70. 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
71. algebra/common math

how do I solve this? I know it's common math, but I cannot remember how! -4x> 1/11 I think I multiply both sides by 11, but..... I can't remember how!

asked by bob on March 28, 2010

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

asked by james on April 2, 2013
73. 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
74. Math

Solve the equation sin2x=2cos2x, for 0 degrees

asked by Charles on January 14, 2013
75. 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
76. math

how do I solve this? I know it's common math, but I cannot remember how! -4x> 1/11 I think I multiply both sides by 11, but..... I can't remember how!

asked by bob on March 28, 2010
77. Pre Algebra

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

asked by Luke on September 1, 2009
78. 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
79. 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
80. 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
81. math

Solve the trigonometric equation from 0¡ã¡Üx¡Ü360 tan⁡x+¡Ì3=0 2 sec^2⁡x+tan^2⁡x-3=0

asked by Anonymous on June 4, 2015
82. math

complete the table given values of x. then use the table to solve the given equation numerically. x-5=-4 x -1 0 1 2 3 x-5 -6

asked by Synde on September 14, 2013
83. 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

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
85. 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

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
87. 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
88. 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
89. Math

Solve for y x-2y/5=3(y+2)/4 +3 This is what I did and I don't know if it's right or what to do next. Find the Lcd which is 20. I get: 4x-8y=15y+30=60 I don't know what to do from here. I'm so confused.

asked by Laura on August 24, 2010
90. 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

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

92. math

Someone please help me with this question. What would happen to an equation if you solve from right to left instead of left to right? And please provide an example.

asked by sammyg on May 5, 2011
93. Math

solve. If 1/4inch equals50miles find the miles represented by 41/2 miles.

asked by Leigh on February 6, 2013
94. Algebra 1

solve: log8(w-6)=2-log8(w+15) note: the 8 is to be little at the bottom right corner of log

asked by Britt on November 19, 2012
95. Precalculus

Could I solve (800+x)tan33=xtan35 like xtan33=(x/800)tan35?

asked by Angie on December 29, 2014
96. Math

How do you find the sonstant variable for Direct variation or k? And how would you solve? It if it was to find what x or y is

asked by Random on November 9, 2014
97. 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
98. Test prep

solve: log8(w-6)=2-log8(w+15) note: the 8 is to be little at the bottom right corner of log

asked by Britt on November 19, 2012
99. 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
100. 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