# 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 481
1. ## math

Solve the formula for the given letter. Assume all variables represent nonnegative numbers. a^2+k^2=j^2, solving for a

asked by jen on April 6, 2010
2. ## college algebra

Solve the following exponential equation by expressing each side as a power of the same base and then equating exponents. 31-x = 1/27

asked by yan on August 14, 2015
3. ## Algebra

solve the equation by completing the square. round to the nearest tenth. x^2+8x=10 A. 1.1, 9.1 B. 1.1, -9.1 C. -1.1, 9.1 D. -1.1,-9.1 my answer is A is that correct

asked by Cassandra on April 8, 2017
4. ## Math

I have to solve this inequality, but i forget how to do it. I remember your supposed to do something special when your like subtracting a negative from both sides? Y-5>-6

asked by Emily on March 24, 2008
5. ## Analytic Geometry

Give the equation of the circle tangent to both axes of radius 5 and in the 1st quadrant. Can you help me solve this?

asked by Lance on January 21, 2013

does consistency mean fair, and can i have a clear explanation on what social proof is, and agitate and solve, and prognosticate,

asked by loli on September 27, 2013
7. ## Math help

Solve: x^2 +5x=1. Use a calculator to approxiamte the solutions with rational numbers. is the answer -0.1925824, 5.65331193 ?

asked by Shawn on November 9, 2008
8. ## math

Solve for n: ((3^n)^n*(3^n)^-1) / 81 = 1 Answer (n) = -1, 4 I have no idea how n = -1, 4. Also, please don't ask if the answers are actually wrong or not, they are directly from the text book.

asked by anonymous on November 23, 2017
9. ## science(physics)

the sum of three forces f1=100n, f2=80n, f3=60n acting on a particle is zero. The angle between f1 and f2 is: Please solve

asked by marley on June 9, 2011
10. ## Algebra 1

Hi! I'm doing my math homework, but I got confused. Can someone please help me how to solve simplest radical forms with an example? With square roots?

asked by Bob on March 20, 2014
11. ## History

What is one environmental issue that both the U.S and Canada are facing. Explain how the countries are working together to solve the problem. PLEASE HELP!!!!!

asked by swimmerGirl on March 2, 2017
12. ## Rectangles,Rhombi,and squares

Can someone help me with this? ABCD is a rectangle. AD = x + 10, BC = 2x + 8 and CD = 5. Solve for BD. I love problems like this. Draw out a diagram. Also, use the Pythagorean Theorem.

asked by Mike on April 30, 2007

Use row operations on augmented matrices to solve the given systems of linear equations. x + y − z = 0 x + 2y + 4z = −3 3x − y − 22z = 19

asked by cameron on November 16, 2015
14. ## Physics

asked by John on August 29, 2011
15. ## Math

Solve each literal equation for the indicated variable 2x-3y=4 for x The answer is suppose to be x=3/2y+2 I don't understand how you do this problem?

16. ## Pre-Algebra

How can I solve this problem, I'm stuck on it: Approximate to the nearest hundreth by interpolation 5*square root of 84.4 Thanks -MC

asked by mysterychicken on June 5, 2009
17. ## MATH

heres my equation: c(coat)+s(shirt)+t(tie)=\$300 c=2s s=2t+40 i need to know how to solve this to get the cost of each item?

asked by alice on February 8, 2013
18. ## trig

solve equation for the exact solutions if possible put answer in degrees. 2tanx/3-tan^2x=1

asked by jeff on May 30, 2012

Could someone help me with those two questions. I need to know how to do them without calculator solve for the interval [0,2pie] 1) cos^2*x-cos2x=0 2) tan(x/2)-sinx=0

asked by Anonymous on June 2, 2010
20. ## Math

The equation of the parabola which contains 2 points (1,1) and (-2,-2) and whose tangent at the point (1,1) has the slope k is y=1/3(A)x^2+1/3(B)-2/3(C). Express A,B and C with k .please solve this problem

asked by Bayarbold on June 10, 2011
21. ## math

If you have a graph 15 students like b-ball 10 like soccer and 5 like softball Write a ratio and solve the poblem

asked by Jill on November 7, 2010
22. ## Math

Finding a polynomial with intereger coefficients that satisfies the given conditions: p(x)=3, and zeros 3, 2i, and -2i. I can not figure how to solve this, Please Help!

asked by Shainah on February 15, 2007
23. ## MATH HELP

In desperate need of help! solve by factoring. 1. x^2=-25+10x 2. 2x^2+9x=5 3. The length of a square is 4x-3. Find the area in terms of x.

asked by Anonymous on March 20, 2014
24. ## Algebra

Simplify the rational expression. (45y-9xy)/(x^2y-25y) I got an answer of 9y/y(x+5) but it seems to be wrong. Can anyone solve this for me and see what they get? Thank you

asked by Alex on September 22, 2010
25. ## Math

Solve (log base 2, cube root of 2) log2(2^1/3) You transform it into the form above, right? then you cancel the 2s to get 1/3

asked by Nemo on September 29, 2011
26. ## linear algebra

1.solve x-7>10 a.x>3 b.x>7 c.x>17 d.x>70 this is for the solving multiple step inequalities please help with all ten questions i have 1.a 2.d 3.c 4.c 5.b 6.d 7.c 8.d 9.b 10.b warning these are what i have and are not correct

asked by stewpeed connexus kid on December 5, 2018
27. ## Chemistry

#sig fig in 6.0223010000 x 10-24 = ? Can someone help me solve this equation showing the steps involved to get the answer?

asked by Susan on February 15, 2012
28. ## Math

Looking to find the missing digit for each statement true. The number 874_ is divisible by 4. Please help how to solve

asked by Cyle on August 28, 2015
29. ## algebra

Exponential functions and logarithms 1) ln(1/cuberoot e^2) 2)e^ln12 3)log3(root3)^5 4) 3^x-2=18 5)e^3x+=10 6)8^x=5^2x-1 I'm really not positive on how to solve these

asked by yaga on September 4, 2016

1.evaluate without using a calculator 2logx+1=log900 2.solve the following equation A. 3log(x-2)=4.714 B. 16^x-3 = 8^2x+1 C.10^2x=1/100

asked by Maria on March 11, 2015
31. ## trig

Solve rounding to 2 decimal places. 9cosx + 4cos(2x) + 1 = 0 over 0° ≤ x < 360° Thanks to anyone that can help! I'm totally stumped.

asked by Jodi on April 10, 2013
32. ## Math

A. L1: (0,-1), (5,9) L2: (0,3), (4,1) The lines are perpendicular because there slopes product equal -1. The point they intersect is (1.6,2.2).(Is this true and how do you solve it)

asked by Khylisha on February 9, 2011
33. ## college algebra

help solve 8=2^5x * 4^x^2 logarithms eight equals 2 to the 5x times 4 to the x squared in case I didn't write it correctly.

asked by Cindy on May 2, 2010
34. ## Algebra

I need to solve these equations : 1) 5w^2 - 5w = 0 2) 2x^2 + 15x = 0 3) -32y^2 - 24y = 0 4) 6h^2 = 3h 5) -42z = 14z 6) -12p^2 = -30p

asked by Scott on March 12, 2013
35. ## alge

What square root property is essential to solve any radical equation involving radicals?

asked by shelly on August 21, 2010
36. ## Augmented Matrix

can someone please help me solve this question? I tried so many times but I still could not get it... 2x + 3y = 4 5x + 6y = 16 Augmented Matrix the ans is supposed to be (8,-4) thanks in advance much appreciated

asked by Kabdul on March 3, 2009
37. ## Math

Solve 3 - x = √x2 - 5 . State any extraneous roots that you found. Identify the values of x for which the radical is defined.

asked by Emmanuel on January 1, 2016
38. ## Physics

Could someone tell me how to start to solve this? Please How much current flows in a 1000-ohm resistor when 1.5 volts are impressed across it?

asked by Sheila on October 27, 2007
39. ## trigonometry

rewrite each equation in rectangular form and describe the graph. solve for y if possible. a. theta = pi/6 b. r=8costheta

asked by help on November 25, 2014
40. ## Physica

if A=12x - 16y and B= - 24x + 10y,what is the magnitude of the vecror C=2A-B? Please check out the necessity to solve them and thank

asked by Q77 on July 11, 2012
41. ## Math

Determine the perimeter of the rectangle if x = 2*sqrt2cm. In simplest radical form. ^ Don't get how to solve.

asked by -Untamed- on December 10, 2011
42. ## Math

Can anyone explain Horizontal Equalities Equations? I also would appreciate examples of problems and the steps to solve the problem.

asked by Jo Anne on December 7, 2007
43. ## CHECK MY ALGEBRA 2

Write an equation that would have a hole at x = 4 and a vertical asympote at x = -2. My answer was f(x)= (x-4)/(x+2) If it is not correct can someone please help me solve it and explain it to me? Thanks!

asked by Kate on July 25, 2016
44. ## computers

Write an algorithm, in English, to solve the following problem. Be sure to include pre- and post-conditions!

asked by Johnny on April 16, 2010
45. ## Health and science

What problems could a solar powered pond water filter solve and what impact would it have on people?

asked by smart1111 on January 19, 2016
46. ## math

The polynomials P (x)=x^3-x^2+4x and Q(x)= x^3+6x+10 leave the same remainder when divided by x-a .find the possible values of a and solve the inequality P (x) is greater than Q (x )

asked by tinotenda on August 20, 2016
47. ## Math

Add fraction and mixed numbers and reduce to lowest term 9 2/3 3 2/5 3/4 Can someone explain how to solve?

asked by Dave on June 2, 2011
48. ## Math Logarithmic Question

Solve for all possible values of x within the domain of the following logarithmic expressions. a)logx+log2=log7−log3

asked by Chris on January 1, 2016
49. ## Nuc. Chem

HELP!!! I have like 20 of these kinds of questions on my homework and no clue how to solve them. Electron capture transforms 40 K 19 into what nuclide?!?! Thank you

asked by Jonathan on March 4, 2008
50. ## maths

r=1-rcos(theta)convert into rectangular equation? r with cos creating trouble for me how to solve this?

asked by Asfand on November 29, 2016
51. ## math/algebra

cab someone help me? solve by quadratic formula 3x^2 - 5x = -1 I cannot come up with the -5x and get the 1 for factoring. put it into standard form: 3x^2 -5x +1=0 a= 3 b= -5 c=1 x= (5 +- sqrt (25 -12)/6

asked by dee on August 19, 2007
52. ## precal

identify all solutions in the interval [0,2pi]: cos (2x) csc^2x=2cos(2x) I have no clue how to solve.

asked by DF on March 17, 2015
53. ## Augmented Matrix

can someone please help me solve this question? I tried so many times but I still could not get it... 3x + y = 2 4x – 2y = -3 Augmented Matrix the ans is supposed to be (1/10,17/10)) thanks in advance much appreciated

asked by Kabdul on March 3, 2009
54. ## Math

I've missed a lot of math in the past few years so I'm a bit behind. I need to solve this question using reciprocals. 15.6 + 5.5 ------------- 18.1(11.1-9.2)

asked by Lallie on February 23, 2009
55. ## Algebra 1

Write an equation in standard form for the line through (9, -2) and (13, -8) Do I solve this by doing y2-y1/x2-x1. That would give me the slope and then plug in the 13 for the x and -8 for the y?

asked by Elisa on September 29, 2009
56. ## Algebra

Simplify the rational expression. (45y-9xy)/(x^2y-25y) I got an answer of 9(5-9x)/((x-5)(x+5)) but it seems to be wrong. Can anyone solve this for me and see what they get? Thank you

asked by Alex on September 22, 2010
57. ## Math Algebra1A

What are two symbolic techniques used to solve linear equations? The only thing I find is eliminating or substuting is that right?

asked by Kim on June 20, 2013
58. ## calculus

solve the following exponential equation 9^x=6 I get In6/In9 what is the answer approximated three decimal places?

asked by Austin on January 1, 2013
59. ## Calculus

Write the form of the partial fraction decomposition of the rational expression. It is not necessary to solve for the constants: 4x + 1/(x + 6)(x - 5) I came up with A/x + 6 + B/x - 5

asked by Kelly on November 28, 2007
60. ## Trig

How do you solve this problem? y = 2sin 3x + 4sin 2x I haven't done these types of problems for awhile and have forgotten how to do them.

asked by Mary on March 5, 2014
61. ## Trigonometry

How do I solve these? 1) 2sinxcosx-cosx=0 2) cos^2(x)-0.5cosx=0 3) 6sin^2(x)-5sinx+1=0 4) tan^2(x)+tanx-12=0

asked by . on April 18, 2010
62. ## algebra

Solve the equation or formula for the indicated variable S=5rTf foRT answers are T=s/5-r,, T=25r/s,, T=r2-5s,, T=s/5r2

asked by Tammy on February 25, 2014
63. ## Physical Science

When attempting to solve a gravitational potential energy equation, is the free-fall acceleration always 9.8m/s2?

asked by Monique on January 26, 2009
64. ## Chemistry

1) Determine the value of delta H net for the following equation: SnBr2(s) + TiCl4(l) -> TiBr2(s) + SnCl4(l) I am not sure how to solve this.

asked by Hannah on January 29, 2012
65. ## Trigonometry

Solve: tan(2theta - 34deg)= sqroot3; theta = [real numbers of degrees]

asked by Ballie on April 19, 2016

If two fair dice are rolled, what is the probability that a total showing is either even or less than eight? How would I solve this question? What are the steps? Thanks

67. ## algebra

Solve each absolute value equation or inequality and choose the correct answer from the choices provided. |x| + 5 = 18 help

asked by yeet on October 23, 2018
68. ## Calculus

Can someone solve this integral for me? My calculator just gives me a decimal approximation but I need an exact number. Thanks! :) pi[{3ln(3)^2 - 6ln (3) + 6} - {ln(1)^2 - 2 ln(1) + 2}]

asked by Lin on March 30, 2008
69. ## Critical Thinking

Using any of the leadership styles, how would you solve the problem of student parking on campus (to make it more efficient)?

asked by James on June 10, 2008
70. ## Calculus

Can someone help find limit using l'hopital rule lim x → ∞ ((3x-4)/(3x+2))^(3x+1), I'm trying to solve by adding ln function to both side.

asked by Po on December 3, 2016
71. ## algebra

2a+11=a+5 _____ 3 help 2a+11/3=a+5 is that the question? if it is 2a+11/3=a+5/1, then you cross multiply 3(a+5)=2a+11, distribute the 3, which equals 3a+5=2a+11 so now solve for a , bring them to one side, a=-4

asked by debbie on May 18, 2007
72. ## chem

Given the following wavelength of light, calculate the energy of one photon in Joules. λ = 1 x 10^0 meters what does it mean? i don't know what to do or how to solve

asked by will.i.am on February 11, 2013
73. ## Trig

use a graphing utility to solve each equation, rounded to 2 decimal places 1. x^2 - 2sin2x = 3x 2. x^2 = x + 3cos2x

asked by KC on September 26, 2007
74. ## Geometry

I really need to know HOW to solve this. Please-don't even give me an answer, just instructions? Segment AB is a diameter of circle C. If A = (19, 3) and B = (37, 29), what are the coordinates of C?

asked by Kayte on May 13, 2010
75. ## Math

A eighteen-sided die is rolled three times. In how many ways can this happen? How would I solve this problem?

asked by Harry on September 4, 2016

*Describe your graphs using words. 2x > -6 and x - 4 < 3 You have to solve for x. x>= -3 and x

asked by Margie on March 12, 2007
77. ## Algebra

asked by Merty on April 17, 2015
78. ## statistics

if n=30 and p=.23 what is P(20,x,23)= and P(x.23)= I think I need to find the z scores in order to solve but how do I read the table or do I even need it. UGH! so confusing especially 20 years later.

asked by Amy on October 31, 2013
79. ## Math

Solve the following problem and reduce to lowest terms (mixed number or improper fraction). 2/3 + 1/6 +11/12

asked by April on July 24, 2013

how do I solve 1 2/3 + 1/6. not coming up with the answers they are giving 5x6 +1x3/3x6 30+3/18 33/18 = 11/6 = 1 5/6 (my equations) their ans. 9/16, 11/6, 16/22, 22/12 and 33/18 help

asked by Tonya on November 9, 2015
81. ## geometry

What type of quadrilateral is formed by connecting the points (0,0), (3x,b), (18x,b), and (15x,0)? Explain. How would I solve this?

asked by Tessa on June 24, 2014
82. ## 12 U Math

Solve and check for extraneous roots. log_2x+log_2(x+2)=3 * _2 is a subscript and (x+2) isn't a superscript*

asked by Vikki on January 12, 2015
83. ## Algebra 2

Use trigonometric identities to solve each equation for the given domain. sin 2θ = -cos θ for 0 ≤ θ < 2π *Anyone who has any idea which identity to use is welcome to help

asked by Bob on April 1, 2015
84. ## Statistics

What key problems can a supermarket address and solve utilizing the poisson/exponential combination?

asked by Jason L on March 7, 2007
85. ## calculus

A. find y' by implicit differentiation. B. solve th equation explicitly for y and differentiate to get y' in terms of x. cos (x) + √y = 5

asked by Sasha on October 14, 2010
86. ## Triangles

solve any triangles satisfying alpha = 20 degrees b = 10 c = 16 b and c are 2 side values and if I use the pythagorean theorem and I get 18.18? Did I do this right?

asked by Greg on November 14, 2012
87. ## math

need help to solve the following ploblem, and like problems: 5 minutes = _____ hours (what is the fraction) I'm in the 5th grade

asked by Janae on January 31, 2008
88. ## geometry

What type of quadrilateral is formed by connecting the points (0,0), (3x,b), (18x,b), and (15x,0)? Explain. How would I solve this?

asked by Tessa on June 24, 2014
89. ## Algebra

Solve the following equation or inequality for the unknown variable. Round answer to two decimal places if necessary. 10 – x < 4

asked by Terrance.H on July 3, 2012
90. ## Math

HELP?! 1.-9^2 2.(5x^9y)(-2x^-2y^-3) 3.(a^1b^-2) / (a^-2b^4) 4.(7x^-1/y^4)^-2 Scientific notation: 5) .0000745 Decimal Form: 6) 9.3*10^6 Solve: 7.3√-27 8.√(-5a)^2 Simplify: 9.√60x^5y^2 10.√75x^3 / √3x

asked by Chris on August 16, 2012
91. ## English

What we should take note of is the fact that the designation of English as a second language will not solve everything. (What is the grammar mistakes in the sentence above?)

asked by John on January 31, 2009
92. ## math

Solve X + 1/x – 2 ≥ 3 I know you have to subtract the 3 from both sides to get the zero on right of the inequality sign. I don't understand how to make one fraction after I do this.

asked by Sydney on July 26, 2009
93. ## language

help me solve this analogy closed is to emptiness as open is to occupancy vacancy security enclosure

asked by mandy on March 31, 2011
94. ## co-ordinate

Please help me to solve this:find the equation to the circle circumscribing the quadrilateral formed by the straight lines, 2x 3y=2, 3x-2y=4, x 2y=3 and 2x-y=3

asked by math on July 25, 2015
95. ## Math

Using the numbers 2, 5, 10 , 50 solve the following equation to make the number sentence true... ? - ? Divided by ? + ? equals 50

asked by Lilly on September 30, 2010
96. ## Pre-Cal

Solve 5sinx=-4cosx for 0 less than or equal to x

asked by james on January 10, 2010
97. ## math

need help how to solve rounding riddles? rounded to the nearest ten. I am 170. The sum of my digits is 14.

asked by Noah on September 28, 2011
98. ## math

kx^2 + (k+2)x -3 =0 has roots which are real and positive. Find the possible values that k may have. I understand that I have to use the discriminant to solve this, but I can't seem to get the answer right, so I really need help!!

asked by Anita on September 28, 2014
99. ## Algebra 1

I'm having trouble solving x=2(x-1)+6 I understand but I get confused on some of the problem and this is one of them. It's probably very simple to get the answer but can someone please just walk me through on trying to solve it?

asked by DeJa on September 3, 2013
100. ## Algebra

I am in dire need of some help I am not understanding this at all I am to solve the systems of equations by graphing 2x-y=14 2x+3y=-10 Could someone please explain this to me in dummy terms

asked by Anonymous on June 26, 2008