# 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 97
1. ## Math

asked by Ciara on June 4, 2018
2. ## Pre-Algebra

combine like terms and solve equation: m/4-6=2

asked by Lucy on September 20, 2010
3. ## Math

Where does the parenthesis go to make the equation true 5+4*3-1=18

asked by Abel on September 12, 2016
4. ## MATH

What is the equation of the parabola with a directrix at y = 4 and focus (0, -4).

asked by Vince on June 7, 2011
5. ## algebra 1

in the equation below, y is a function of x. y = 4x + 8 if the value of x isdecreased by 3, how will the value of y change?

asked by Jamie on September 20, 2010
6. ## algebra

state the slope of line given the equation y=2/3x+6

asked by jerry on March 1, 2010
7. ## Geometry

which is the equation of a circle with center (5, -2) and a radius of 3?

asked by Kat on May 31, 2018
8. ## maths

solve the equation using cramer's rule. 3x+2y=12 and 2x+3y=7

asked by Joseph on May 27, 2018
9. ## algebra

What number is used to complete the square for the equation x^2 + 5x = 0? a) 25 b) 6.25 c) 2.5 d) 10 d

asked by ant on June 4, 2010
10. ## algebra

Find the root (solve) of each equation. a)1/3 (2w-6)=-10 b)3a-7/4=4a+5/3 c)3k/2-k+3/3=8-k+2/4

asked by bev on October 27, 2009
11. ## Amos

What is the chemcal equation between ethanethiol and methoxide anyone?

asked by Rani on December 11, 2016
12. ## algebra 1

An equation is not a function if even one x value produces ____ corresponding y value(s). a. one b. less than one c. more than one d. zero for a Is it A?

asked by Toni on May 18, 2010
13. ## Math

What number makes the equation true? + 29 = 98

asked by Aniyah Holmes on November 19, 2018
14. ## Catholic university of Cameroon bamenda

Mk y the subject of the equation 100x-500y-5x^2-5y^2=0

asked by aristide on November 17, 2015
15. ## intermidate algebra

solve equation(rational expression) 3/10=5/x 3x=50 x=50/3 x=16 2/3 is this right.

asked by Keaton on May 18, 2010
16. ## Math.

Solve the linear equation. 14x−1/2(4x+6)=3(x−4)−18

asked by April Martinez. on December 12, 2016
17. ## Algebra

Write an equation of the line that passes through (8, 3) and (4, 3).

asked by joshua on January 5, 2011
18. ## math

How can you use an equation to make a prediction from a pattern?

asked by erica on August 30, 2018
19. ## math

how do you determine an equation in a line of best fit?

asked by Ted on May 18, 2010
20. ## Calculus

Write the following equation in logarithmic form a^(4b-6)=3c+d

asked by Lexy on November 27, 2018
21. ## math/equation/Paul

I meant is 12 the correct answer to the equation 4+8[9/3(9-6)]

asked by Christ on January 4, 2010

Let f(x) = x^3 - x^2 + x - 1. Find an equation for tangent line to f at x = 2.

asked by Cecille on March 23, 2011
23. ## Science

What is equation between ethanethiol and methoxide ion?

asked by Cheyenne on December 11, 2016
24. ## math lit

complete the ordered pair for the equation (__, 15)

asked by T on December 9, 2016
25. ## MATH

solve each system of equation by elimination: a. 3x-4=y, 3x=y+6 b. 2x=y+1, y=6-3x c. x=5y+5, 3x=7-y Thank you :))

asked by Camz on February 24, 2016
26. ## precalculus

can you explain what the equation y = a(x - h)2 + k, a ≠ 0 means and what it represents?

asked by Benjamin on December 5, 2016
27. ## Calc 3

The plane containing the lines r1(t)=⟨1,−4,−1⟩+t⟨1,2,−2⟩ and r2(t)=⟨1,−4,−1⟩+t⟨1,0,3⟩ has scalar equation

asked by ally on September 11, 2018
28. ## to reiny

so would my equation be: d^2 + 3^2=6^2 d^2 + 9=36 d^2=27 d=square root of 27? d=5.197 or 5.2?

asked by Lauren on December 5, 2009
29. ## Math

What is the equation of the parabola with x-intercepts 1 and 3, and that passes through (–1, 16)

asked by XOXOX on November 22, 2015
30. ## Algebra 2

I don't know if I did this equation right.. ln 6x (greater than or = to) 4 I got 9.0997

asked by Ana on March 9, 2010
31. ## math

(2+3)+(3+4) = (3+4)+(2+3) does this equation demonstrate the commutative property? why or why not?

asked by Joe Joe on September 16, 2010
32. ## Math

If i'm given the equation 4.23= -.19t^2+2.56t-2.37 how do i find the value of t?

asked by Isabel on August 22, 2010
33. ## Math

y = -6 when x = -2 y varie directly with x. what equation relates x and y? x/y = -2/-6

asked by Jasmine on June 3, 2007
34. ## algebra

What is the equation for the line with a slope of 7 and a y-intercept of -1 ?

asked by Jack on September 19, 2016
35. ## MATH

Which ordered pairs are solutions to the equation? y = 3x – 4 A. (11, 5) and (2, 2) B. (5, 11) and (3, 2) C. (5, 11) and (2, 3) D. (5, 11) and (2, 2)

asked by KYLIE on February 23, 2016
36. ## Chemistry

H2O2 → H2O + O2 is this a balanced equation?

asked by Person on December 2, 2017
37. ## Math

Graph the Equation x=-2 What of I do after this step 0x+1y=-2 1x+0y=-2 I am really confused

asked by Standard on December 8, 2016
38. ## Algebra

Write an equation of the line that passes through (8, 3) and (4, 3).

asked by joshua on January 5, 2011
39. ## college algebra

Write equation in slope form y+3= -3(x-6)

asked by BJ on April 23, 2010

Let f(x) = x^3 - x^2 + x - 1. Find an equation for tangent line to f at x = 2.

asked by Abi on March 23, 2011
41. ## Math

Solve the equation. 1. y-5/3 =1 A -2 *** B 8 C 18 D 6 2. 6x + 29 =5 A -4 B -18 ** C 204 D -144

asked by Louis on September 18, 2016
42. ## Algebra

Is there an instance when a linear equation is not a function?

asked by Anonymous on April 20, 2010
43. ## math

solve quadratic equation by factoring 5x^2-6x-11=-3

asked by jerson on April 18, 2010
44. ## math

Which choice is equivalent to the equation -4(x+b)=p+8b A: x=p+7b-4 B: x=-4p-28b C: x=-1/4p+b D: x=-1/4p-3b

asked by Gg on September 18, 2016
45. ## Algebra

how to plot the equation and find the y intersect of y + x = -10 thank you

asked by Diana on October 7, 2009
46. ## range and domain

whats the domain and range of the equation 2x^2+2y^2-20=0

asked by asim on November 10, 2010
47. ## Math

y - 5 / 3 = 1 Could someone help me solve this equation? I'm stuck and I need an explanation on how to get it, please and thank you. (:

asked by ShookySuga on December 7, 2018
48. ## Math

Which ordered pairs are solutions to the equation? y = 2x + 5 A. (5, 15) and (2, 9) B. (5, 10) and (2, 9) C. (15, 5) and (2, 9) D. (5, 15) and (9, 2)

asked by Anonymous on February 26, 2016
49. ## Math help Mrs.Sue

Which ordered pairs are solutions to the equation? y = 2x + 5 A. (5, 15) and (2, 9) B. (5, 10) and (2, 9) C. (15, 5) and (2, 9) D. (5, 15) and (9, 2)

asked by Anonymous on February 26, 2016
50. ## Math

The roots of the quadratic equation z^2 + az + b = 0 are 2 - 3i and 2 + 3i. What is a+b? Can you please help me with this question?

asked by Joshua on January 3, 2017
51. ## Algebra

What is the slope and y-intercept of the equation? Y=7/10x-4

asked by Guesshwyalolll on February 26, 2016

What is the balanced chemical equation for P+H2>PH3?

asked by Butt on December 3, 2009
53. ## math

Rewrite each equation to isolate the indicated variable. y = 9x + 2 for x df = g - 10 for d

asked by Tori on December 8, 2017
54. ## algebra

In which direction does the parabola that is given by the equation below open? y = -4.5(x - 6)2 + 1

asked by Tamra on January 6, 2010
55. ## Linear EQUATIONS

Need help! Graph the equation and identify the y intercept. Y = 1/5 x THANK YOU!

asked by Jessica on November 12, 2010
56. ## Vectors/Calc

Find values of a, b, and c which satisfies the following equation: a(2,1,0) + b(-3,4,5) + c(2,0,3)= (-4,10,7)

asked by Anonymous on May 23, 2011
57. ## Physics

solve for h in the equation for density P= M/V and V= pi r squared h

asked by tom on August 28, 2018
58. ## Algebra HELP!

how would I solve this on a equation to graph and what would my slope be? -3x-2y=18 and 3x-y=0

asked by Alea on November 12, 2015
59. ## Math

Write an equation that is parallel to the line y=-2x+4

asked by Aria on December 20, 2016
60. ## Algebra

Determine whether x is positive or negative in the following equation: x-|x|=0

61. ## Algebra

how would I solve this on a equation to graph and what would my slope be? -3x-2y=18 and 3x-y=0

asked by Alea on November 12, 2015
62. ## Math

Use an equation to solve the problem. What is 57% of 11? A. 11 = 0.57 • n; 19.3 B. n = 57 • 11; 627 C. n = 0.57 • 11; 6.27 D. 11 = 57 • n; 0.19

asked by Anonymous on November 27, 2018
63. ## math

2/27(x-3)√((x^2-6x+23)/y)rearrange the equation to make y the subject

asked by alan on May 25, 2011
64. ## Algebra

Write the equation y - 2 = 4(x + 5) in standard form

asked by joshua on January 5, 2011
65. ## Math

How do I find the equation of a tangent of y=cos(2x+(pi)/3) at x=(pi)/4

asked by Kayla on August 17, 2010
66. ## Intro to Chemistry

How do balance this equation K2S+CuSO4

asked by Ariel on October 8, 2009
67. ## Math

I have to factor this equation, which is a perfect square: 2p^2+4p+1 How do I do this?

asked by Anya on October 29, 2009
68. ## math

Solve the system x^2+(y-3)^2-9=0 x+y-1=0 Substitute 1-x for y in the first equation. x^2 + (x+2)^2 = 9 4x + 4 = 9 Take it from there

asked by Angie on March 5, 2007
69. ## calculus

solve the following differential equation: y' + (y)tanh(x) - 2e^x = 0

asked by Christine on May 7, 2008
70. ## Science

The word equation for Iron and Sulphur

asked by Daphne on October 29, 2011
71. ## Algebra 1

Without solving the equation -3x+5=44, tell whether the value of x is positive or negative. How do you know?

asked by Mercedez on October 29, 2011
72. ## Math

Given f(5) = 5 and f(9) = -2 determine the equation of the linear function f

asked by Anonymous on February 23, 2015
73. ## Math

How to make an equation out of 0,5 and -3,-4 on a coordinate plane

asked by Coleson on October 9, 2014
74. ## Algebra 2

Solve the equation x^3 - 3x^2-22x+24=0 do you use a graph?

asked by Nancy on February 22, 2015
75. ## Math

How to make an equation out of 3,3 and 0,1 on a coordinate plane

asked by Coleson on October 9, 2014
76. ## math

what is the general equation for half-life?

asked by Anonymous on February 15, 2008
77. ## Algebra

What are the slope and the y-intercept of the graph of the equation 4x-2y=5?

asked by randi on May 18, 2009
78. ## Linear equation

Graph each equation by making a table. Y = 4

asked by Ashley on November 29, 2012
79. ## AAlgebra 1

Graph each equation by making a table. Y = 4

asked by Ashley on November 29, 2012
80. ## Algebra 2

solve the equation x^2 - 3x^2-22x+24=0 do you use a graph?

asked by Nancy on February 22, 2015
81. ## math

Can you please give me a example of a - and + multi step equation

asked by Ethan on January 19, 2012
82. ## Linear equation

Graph each equation by making a table. Y = 4

asked by Ashley on November 29, 2012
83. ## Math

How would I solve this equation? -11p^6r^4 ---------- (-2p^4)^3 (-10p^5r^4)

asked by Yvette on November 28, 2007
84. ## Math

Is there another way to write this equation? y=35.15e^1.04x

asked by Anonymous on October 15, 2014
85. ## Math

Find the slope of the line described by each equation 7x-6y=42

asked by Coleson on October 8, 2014
86. ## Physics

How can one solve this equation for t? Y = 1.3 + 18.8 t - (g/2) t^2 = 0 (Assume g = 9.8 m/s^2, the value on Earth)

asked by Anonymous on January 21, 2012
87. ## algebra 1

how do you solve this equation with the substitution method. 1) 6x + 4y = 6/5

asked by debbie on August 21, 2012
88. ## Math

How do you do an equation of line perpendicular through y-intercept?

asked by Hannah on December 1, 2013

solve the rational equation 4/x-2=x/12 would the answer be -1,3

asked by nicky on August 22, 2008
90. ## pre-calculus

equation for parabola with focus (8,-2) directrix x=4

asked by phill on June 2, 2013
91. ## Math

Find an equation for the line that contains the points (2, -3) and (6, 9).

asked by Brian on June 2, 2013
92. ## Algebra

Rewrite the equation 2x+4y+2=3y+5 in general form. A.2x+y-3=0 C.2x+y=3 B.y=-2x+3 D.2x+7y+7=0

asked by denaa on August 22, 2012
93. ## Math

The equation of a circle A(x^2+y^2)+Bx+Cy+9=0 that passes through (1,0), (2,-1) and (8,7). Find B. Thanks!

asked by Vonne on August 23, 2012
94. ## Math

Find the coordinates of the y-intercept for the given equation x+y=2

asked by Lamar on January 22, 2012
95. ## math

what is the answer to this systems of equation using elimination 2x+3y=11 and 3x+3y=18

asked by malachi on December 13, 2010
96. ## MATH 101

How do you solve system of equation problem. example x+3y=32 -3x+2y+3 and x+y=6 x-y=-9

asked by Ann on October 26, 2011
97. ## PHYSICS

what is the equation for bose einstien condensate?

asked by lissa on October 27, 2011
98. ## algr.2

solve for the equation or formula for the specified variable x+y-a=b,for y over Z

asked by hannah on August 29, 2012
99. ## algebra 1

Find the slope and y-intercept of the equation. y+3=-1/3x

asked by jackson on October 27, 2011
100. ## math

A number K increased by 10 is the same as 24 How would you write this as an equation

asked by gamer65 on February 25, 2015