# why does the equation x^2=-9 has no real solution why does the equation x^2 = 9 has two solutions

56,329 questions, page 99

Solve the equation. 2log_2(x-5)+log_2(2)=5

asked by kristina on December 3, 2012
2. ## calculus

implicit differentiate this equation in terms of y x^2y^2=(y+1)^2(4-y^2)

asked by ned on December 8, 2008
3. ## Chemistry

A balanced equation for CuSO4+NaCl--> ???

asked by B Hlock on November 20, 2007
4. ## math

solve the equation for x using the fact that if a^u =a^v then u=v. 9^-x+15=27x. thanks

asked by april on December 4, 2013
5. ## Math

How do i find the equation of a parabola in the form ax^2+bx+c?

asked by Jake on January 7, 2008

Does anyone no what to do with this equation..... here it is..... 5x x 18.75=93.75 do u divide or do i multiply to get my answer.

asked by Aaron on June 10, 2009
7. ## Algebra 1

How many solutions does then system of equation have? y-5x = -6 and 3y-15x=-12

asked by Steve on December 23, 2014
8. ## Algebra 1

How many solutions does the system of equation have? x-4y =12 and 5x-20y =60

asked by Steve on December 23, 2014
9. ## math

What is the distance between two parallel lines whose equation is L1,3x-4y+10=0 and L2,3x-4y+2=0

asked by Abas on November 22, 2011
10. ## math

use Distributive property to solve equation 9(b-4)=27

asked by linda on October 9, 2012
11. ## Linear equation

Write a linear equation relating x and y x 0 3 6 10 y 2 8 14 22

asked by Chan on October 10, 2012
12. ## Pre-Calc/Trig...

Write the equation y = bx in logarithmic form.

asked by Anonymous on December 3, 2014
13. ## Algebra II

Help plz..!!! which is the slope of the line with equation 2x + y = 4 2 1/2 -2 -1/2

asked by Olive on October 8, 2013
14. ## algebra

how to you solve polynomial equation by factoring x^3 + 3x^2 - 9x = 27

asked by john on December 3, 2014
15. ## Chemistry

What is the balance chemical equation for Al(s)+ H2O(l)-->

asked by Milo on January 11, 2009
16. ## Algebra 1

What is an equation for the line with slope 2/3 and y intercept 9?

asked by Steve on December 3, 2014
17. ## mathematics

How do i caluclate the roots of the equation for: x^2-3x-12=0 (x^2-4)=0 (x+3)=0 x^2=4 x+3+0 x=4 x=-3 Am i on the right path or just way off??

asked by Mary on June 27, 2009
18. ## calculus

Solve the following differential equation: f"(x)=sinx, x(0)=0, x'(0)=1

asked by Derek on December 6, 2011
19. ## Physics

Find the gradient and intercept of this equation q=kp^n and qm=kp^n

asked by Emmzy on December 6, 2011
20. ## math

example of a linear equation that is a direct variation....

asked by Anonymous on January 24, 2009
21. ## Math

Can anyone help me with this equation in math. here it is..... 5x x 18.75=93.75 does anyone no how to convert this into the anwser?

asked by Student on June 10, 2009
22. ## maths

Find the product of roots of the following equation (4x + 7 )^2 =4x^2

asked by Francois on August 14, 2013
23. ## Calculus

Find the solutions of the exponential equation e^2x–4e^x+3=0 x1=? x2=?

asked by Kelly on November 9, 2012
24. ## Algebra 2

Solve each equation using the Quadratic Formula. 2x^2+3=7x

asked by Taylor on November 17, 2014
25. ## maths

how to o the factorization method for the equation 2xspuare+x+1=0

26. ## Algebra 2

Solve each equation using the Quadratic Formula. x^2+16=8x

asked by Taylor on November 17, 2014
27. ## math - reqents

i need sOme seriOus heLp . On . some . linear equatiOn . inequalities packet that i have . please HELP =[

asked by HiPOLitO on January 7, 2009
28. ## Chemistry

How would you balance this equation Mg(s)+FeCl3(aq)=Fe(s)+MgCl2(aq)

asked by Lauren on January 31, 2009
29. ## Math

How do we know when we are looking at a direct variation in a graph/equation?

asked by Brittany on January 7, 2008
30. ## algebra 1

write the equation in standard form. Y + 1 = X + 2

asked by A on October 28, 2013
31. ## Algebra

what is the equation of the line that passes though the points (-3,4) and (-9,6)

asked by Natalia on May 28, 2008
32. ## High School Math

Solve the equation. -5=c/7 A. -7/5 B. Ã¢â‚¬â€œ12 C. -5/7 D. Ã¢â‚¬â€œ35 I got C but not sure how to do this

asked by Brian on October 3, 2012
33. ## algebra

Use the quadratic formula to solve the equation. x^2-7x-6=0

asked by Lee on November 6, 2012
34. ## Math

What is the first step in solving the equation 3/4 divided by 2/3

asked by Amy on November 26, 2014
35. ## Chemistry

Calculate Delta H for the following equation: Zn(s) + 2H+(aq) = Zn2+(aq) + H2(g)

asked by Paula on November 28, 2014
36. ## algebra

What is the vertex form of the equation? y=-x^2+12x-4

asked by Lee on November 6, 2012
37. ## Calculus

If f(1)=4 and f'(1)=2, find an equation of the tangent line at x=1 A. y=2x+2 B. y=2x-2 C. y=4x-7 D. y=4x-2 E. None of these

asked by Anonymous on November 30, 2014
38. ## algebra

Find the value of y in the equation y = log 2 32. a. 5 b.16 c.64 d. 1024

asked by Kate on January 23, 2009
39. ## chemistry

what are the products of the equation Al(s)+HCl(aq)AlCl3(aq)H2(g)?

asked by anonymous on September 26, 2013
40. ## Maths

Can you pliz help me solve the following simultaneous equation 3x-y=2 and 3y+9x=4

asked by Smangele Phakathi on September 20, 2013
41. ## Math

What is the equation of the line containing the given pair of points. (1,3) (3,4)

asked by Pam on September 12, 2013
42. ## algebra

write the equation in standard form y=9x+1/2

asked by lorena on December 2, 2011
43. ## Math

What is an equation of the line having the given slope and containing the given point M = -8,(4,6)

asked by Pam on September 13, 2013
44. ## Math

What's the equation of the line containing the given pair of points. (1,4) and (3,5)

asked by Pam on September 13, 2013
45. ## Algebra 2

How would you find the x intercepts of 2x^2+17=0. The original equation is 2(x-3)^2-1.

asked by Ana on December 2, 2011
46. ## Math

What's the equation of the line containing the given pair of points. (1,4) and (3,5)

asked by Pam on September 13, 2013
47. ## algebra

Please rewrite the following equation so that y is a function of x. 3x+18y=36 thanks for your help.

asked by ann on December 2, 2011
48. ## Geometry.HELP! i have finals tomorow!

how do you find the slope when given an equation? like y=blahbalah

asked by jasmine on January 16, 2008
49. ## Algebra 1

What is an equation of the line with slope 6 and y intercept -4?

asked by Steve on December 15, 2014
50. ## algebra

Write the equation of the line passing through (1,0) and (1,-1) a) x=1 b) y=1 c) y=x+1 d) y=-x

asked by becky on January 15, 2008
51. ## algebra

Write the equation of the line passing through (1,0) and (1,-1) a) x=1 b) y=1 c) y=x+1 d) y=-x

asked by becky on January 15, 2008
52. ## Algebra 1

Write an equation for then translation of y = IXI

asked by Steve on December 13, 2014
53. ## SCIENCE

why is it needed to balance a chemical equation

asked by PULKIT on June 18, 2008
54. ## Confused

Graph equation by plotting points x=2

asked by Felicia on June 13, 2008
55. ## chemistry

what is the chemical equation for cabonated water

asked by BOBBY on June 12, 2008
56. ## math

How can I solve 3*x^2+y^2=300? (Diophantine equation)

asked by mathexplorer on July 15, 2008
57. ## algebra

what is the vertex form of the equation y=x^2+4x-3 Could someone please explain.

asked by LEE on October 20, 2012
58. ## Chemistry

how do you balance the equation with H3PO4(aq)and BaCl2(aq)?

asked by Sally on October 21, 2012
59. ## Math

How do you make a process table out of an equation

asked by Anonymous on December 6, 2014
60. ## Math 116 algebra please check

Use the distributive property to help you solve the equation 7(w-5)=21 w=8

asked by jay jay on July 16, 2008
61. ## chemistry

How is this equation balanced Al2(OH)3 S3 (s) + 3H2O (l) --->

asked by What? on October 21, 2012
62. ## math

How do I write an equivalent equation that does not contain fractions for 1/2 x -5 = 1/3

asked by Logan on December 6, 2014
63. ## Algebra

I'm having trouble with this literal equation. r^2/r^2+a^2=w/x solve for w. Thanks so much for the help

asked by Elva on September 4, 2013
64. ## Algebra

Solve the equation and inequalities f(x)=0 f(x)>0 f(x)

asked by Mackenzie on October 29, 2012
65. ## Algebra

Can someone help me solve this equation?/ [SQRT(2x2 + 5x + 6)]=x

asked by Justin Little on January 19, 2009
66. ## math

The equation of a circle with center (-1, 2) and radius 4 is

asked by ra on June 24, 2009
67. ## Math

Please tell me if I am right. Solve the equation 8(9x-1)=29 answer: x= 37 / 72 or 37 ___ 72

asked by Maggie on June 22, 2008

The equation of a circle with center (0, 3) and radius 3 is

asked by ra on June 24, 2009
69. ## math equation

graph the equation and identify the y-intercept x+4y=12

asked by Lavern on December 3, 2011
70. ## Algebra

Could someone help me with an example of an equation of a nonlinear function? I am not understanding this.

asked by Anonymous on June 10, 2008
71. ## math equation

graph the equation and identify the y-intercept y = 2/3x+ 2

asked by Lavern on December 3, 2011
72. ## Confused

Graph the following equation and identify the y- intercept. y=x+4

asked by Felicia on June 13, 2008
73. ## Math

What would the equation look like when the line is perpendicular to 2x-3y+1=0 and has Y- intercept of 2/3

asked by Leah on November 20, 2013
74. ## algebra 2

Which is the standard form of a circle with equation x^2 + 4x + y^2 - 6y = 3? A. (x+2)^2+(y+9)^2=16 B. (x-2)^2+(y-9)^2=3 C. (x+2)^2+(y-3)^=16 D. (x+2)^2+(y-3)^2=3

asked by Sam on July 14, 2013
75. ## math

Write equation of line given 2 points (1,4) (8,-10)

asked by Patrick on December 12, 2007
76. ## algebra

Find the x-intecepts, for the graph of the equation: y=x^2+4x-5

asked by Jack on November 9, 2011
77. ## Algebra

Determine whether the equation defines y as a function of x. y=-17

asked by tony on July 15, 2013
78. ## Math

How to find the equation of a line graph

asked by M on November 3, 2014
79. ## algebra

What is the x-intercept of the line represented by the following equation? 5x - 37 = -2 A. (0, 2/3) B. (2/3, 0) C. (0, -2/5) D. (-2/5, 0)

asked by glo on November 12, 2013
80. ## Math

how do you find m in the equation: (two fifths) m equals 6 2/5 m = 6

asked by edward on September 17, 2012
81. ## Math

Which equation is not equivalent to A = 1/2bh 2A=bh h=2A/b 2b=A/h b=2A/h I think it is 2b=A/h. Is this correct?

asked by Jane on January 7, 2012
82. ## math

find unknown number in the following equation 9/10 - x +1/5 what is x

asked by bob on January 21, 2015
83. ## Pre-algebra

Find the equation of a line that contains (-2, -2) and is perpendicular to y= -x+3

asked by Barbara Passmore on November 10, 2013
84. ## Math

What is the easiest way to solve an algebraic equation?

asked by Hallie on November 6, 2014
85. ## Algebra

Can you solve these equation by completing the square 2x^2+7x-4=0 3x^2x-1=0

asked by Amy on November 7, 2014
86. ## math

Find the unknown number in each equation. 5a-3a= 18 a=

asked by Anonymous on September 18, 2012
87. ## math

Solve the equation for 0

asked by Lilly on July 22, 2013
88. ## ap calc

If f(x)= (2x+7)^(1/2), where F'(X)=f(x) and F(1)=7, then F(x)=? I know I need to use integration but I do not know how to take the anti derivative of the equation

asked by Anonymous on January 19, 2015
89. ## math

asked by julissa on February 4, 2009
90. ## algebra

What is the equation of the line that is perpendicular to y = 7/9x + 15 and goes through the point (1, -2) ? A. 9x + 7y = 5 B. 9x + 7y = -5 C. 9x + 7y = 23 D. 9x + 7y = -23

asked by opheus on November 13, 2013
91. ## Math

What would the equation look like when the line is perpendicular to x+2y=10 and has a y-intercept of -10

asked by Leah on November 20, 2013
92. ## Calculus

Compute the area of a leaf given by the equation y^2 = (x^2−1)^2 for −1 ≤ x ≤ 1

asked by Antonette on February 2, 2015
93. ## Algebra 2

solve the equation : 5x-2(3-x)=-(4-x) show how you got the answer!!!

asked by Shaka on September 7, 2012
94. ## geometry

what is the equation of the line whose slope is -3 and which passes through (0,5)?

asked by sara on December 11, 2007
95. ## Calculus

The equation of the tangent line to f(x) = \sqrt{x} at x = 64 is y =

asked by Alessandra Romano on October 31, 2014
96. ## algebra

an equation of the line passing through (-5,5) and having slope 6/7

asked by ariel on May 26, 2009
97. ## Math

What is the equation look like when the line is perpendicular to y= 4-3x and has y intercept of 3/4?

asked by Leah on November 20, 2013
98. ## algebra 2

solve equation for x atate any restrections ax-bx+2a

asked by Andrew on July 11, 2013
99. ## Math

What would the equation look like if the line is perpendicular to y=x+2 and has a y-intercept of 0?

asked by Leah on November 20, 2013
100. ## math

what would be an equation of a line that passes through (3,2) and has the same x-intercept as y=2x-12

asked by gnarls on July 17, 2009