# 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 179-
## math

use integer values of x from-3 to 3 to graph the equation y=2x^2=3 can you tell me the coordinates, then i can graph it, i just dont understand how to get them. thanks.

*asked by NaTasha on April 10, 2017* -
## trig

solve the equation of the domain 0¡Ü¦È¡Ü2¦Ð 3cos^2theta - 5costheta -1 = 3sin^2theta

*asked by Amanda on April 9, 2012* -
## chemistry

what is the balanced equation for the reaction of potassium dichromate and potassium hydrogen phthalate?

*asked by rob on January 10, 2013* -
## Maths

a) P is the point on the curve y= 2x^3 +kx -5 where x= 1 and gradient is -2. Find (i) The value of the constant k (ii) The equation of the normal to the curve at P

*asked by Kelly on May 2, 2019* -
## Algebra

Linear Equation -8x+4y=-12 Answer book states is y=2x-3 I am not arriving at this answer when I simpify

*asked by G on February 22, 2008* -
## geometry

The radius of a circle given C (4,-1) and (8,2). What is the equation that defines the circle if its center is at the fourth quadrant?

*asked by dheah on October 31, 2016* -
## math

Calculate the equation for a line that passes through the points (-2, -1), (4, 8) and (50, p). What is the value of p? Ok for the points -2,-1 and 4,8 i gotten y=3/2x+2 i don't know how to get the 50.p part please help me

*asked by Plz help asap on September 29, 2016* -
## Maths

Find the equation of the parabola with its axis parallel to x-axis and passing through the points (-2,1),(1,2),(-1,3)

*asked by Angelina on February 14, 2016* -
## gr 12 chemistry

write an equation for a reaction involving an aldehyde to illustrate a hydrogenation reaction.

*asked by shelly on March 2, 2010* -
## Math

What if I want a garden with 88 square feet and the length measures 11 feet. Is the equation for this 11wx8=88?

*asked by Gail on February 25, 2016* -
## Math

Jessica has 9 more nickels than dimes, and the total value of her coins is 1.50. How many nickels does she have. Write the best equation.

*asked by Marcy on January 14, 2014* -
## Chemistry

How many moles of H2 can be produced from 7.74g SrH2? equation:SrH2 + 2H2O = Sr(OH)2 + 2H2

*asked by Melissa on September 14, 2010* -
## math

Find an equation of the line that satisfies the given conditions. Through (−7, −12); perpendicular to the line passing through (−4, 0) and (0, −2)

*asked by alex on September 7, 2014* -
## geometry

The measures of the angles in a quadrilateral are represented by x, 2x, 3x, and 3x. Write an equation that would allow you to solve for the value of x. Solve for the value of x

*asked by Anonymous on January 18, 2011* -
## trig

Verify the equation is an identitiy: cot(x)tan(x+pi) - sin(pi-x)cos((pi/2)-x) = cos^2x Thanks

*asked by Chris on April 27, 2011* -
## Math

What unknown number makes these equation true. 447+99 =447+100-

*asked by Alyssa on October 5, 2016* -
## Last question, I swear! Math!

Write an equation or inequality. 1. The difference of 73 and a number x is 17 .. How would I write one for this? I really don't understand.

*asked by Not putting it on September 15, 2010* -
## chemistry

In the electrolytic refining of copper, write equation for the reaction of the impure copper.

*asked by Shane on September 6, 2014* -
## math

Solve the equation 8 cos^2 X -2 =0 given that 180< or equal to X

*asked by lindsay on May 18, 2013* -
## chemistry

i need a molecular, ionic and net ionic equation for this : K_3 PO_4 + BaCl_2

*asked by jhong on March 23, 2012* -
## math

Write the equation of the line that has the following Contains point (3,6) and is perpendicular to y = 2x + 4 --------------------------------------------------- I got that the slope was -1/2 but is the y-intercept really 15/2? can you even have this as a

*asked by David on October 14, 2017* -
## math

If it says: "five less than three times a number is 20 More than half a number" would the equation be 3n-5=n/2+20? If so what would the answer be? Please help this is a bit confusing!

*asked by jeffery on January 6, 2014* -
## Chemistry

I don't understand this one at all. Please help! For the equation: MnO2 (s) + 2 CO (g) → Mn (s) + 2 CO2 (g) 1. Calculate ΔG° at 25°C 2. Calculate ΔG° at 125°C

*asked by Kate on April 7, 2015* -
## Math

If h is hours and n is the number of radios remaining, complete the equation: n= ____ x h = ____

*asked by Dee on January 20, 2016* -
## graphing

given one point on the graph (-2/3,(2,5) and the slope, m=-3, develop an equation in te slope intercept format

*asked by Pat on November 13, 2010* -
## geometry

how can the slope formula help you remember the equation for the point-slope form of a line?

*asked by nikki on January 20, 2011* -
## Math

Hello. If I have the following table: Time(x) 18 27 72 81 Distance (y) 8 12 32 36 How would I create an equation relating the variables in the table? y= Please help. I have never done this before?

*asked by Patrick on September 19, 2018* -
## college alg

find the equation of a line that is perpendicular to line y=1/6x+6 and contains point (-7,0) y=? please show work so i can see how its done

*asked by alli on September 4, 2012* -
## Math

when doing inequality word problems does it matter what the order is to go in the equation. For example least to greatest or greatest to least?

*asked by Anonymous on January 13, 2014* -
## algerbra

Using point-slope form, write the equation of the line that passes through (2, –1) and has a slope of –5.

*asked by desire on October 18, 2012* -
## Algebra 2 Mannn

9x^2-y^2-72x+8y+119. how do i change this equation from general form to standard form.

*asked by Miley on June 9, 2008* -
## chem

Calculate [H3O+] for each of the following solutions. a)pH = 8.59 i got 3.00e-9 but it said it was wrong. what am i doing wrong. im using the equation 10-ph = [H30+]

*asked by Beth on April 6, 2011* -
## Math

Write an equation for the line in slope intercept form Slope:-2 passing through (-2,8)

*asked by Lana on October 1, 2014* -
## math

Find the variation equation for the variation statement. z varies directly as x and inversely as y; z = 3 when x = 24 and y = 40

*asked by Anonymous on March 20, 2010* -
## math

Find the equation of a line that is perpendicular to the line y=1/8x+5 and contains the points (-7,0) y= please show work

*asked by caylan on January 6, 2013* -
## Math

Write an equation of the line that is perpendicular to the line y=2x-1 and passes throgh the point (0,-3)

*asked by Erin on May 22, 2011* -
## critique reasoning

Alex decides that 21 divided by 3=7 is NOT a true equation. Is Alex correct? Explain

*asked by Terry on March 4, 2015* -
## 9th grade

the line containing the points x=5+2t and y=-3+t. write the slope-intercept form of the equation of the line

*asked by jane casina on September 25, 2010* -
## Algebra(please help ASAP!)

This is a little difficult... Graph the Function y=3 less than the absolute value of x+2 Obviously you cannot show me this on a graph, but I just need help with solving the equation... Thanks!!!

*asked by Jackie on November 11, 2015* -
## algebra

Can you help me find the solutions of the equation x^2 + 30x=1000...help me solve it step by step..

*asked by Robbie on May 27, 2009* -
## Geometry!

"The measure of an angle is 6 more than 3 times the measure of its compliment. i know the quation is X+3x+6 but how do i solve that equation?

*asked by Danielle on April 3, 2012* -
## algebra2

What is the equation of the line passing through (0, 2) and perpendicular to the line y = 4x – 3 in slope-intercept form?

*asked by Rayniya on November 21, 2010* -
## Linear Algebra

whats the exponential decay equation for 100 atoms that decay 1/20 per day

*asked by Anonymous on January 12, 2012* -
## algebra

-2x+5y=-15 Find the x- and y-intercepts and graph the equation plotting the intercepts. Please show all of your work.

*asked by mary on July 17, 2011* -
## math

for every 30 feet you descend in a cave, it gets 4 degrees colder. if you are at 8 degrees, how far have you gone. how do you write the equation?

*asked by Anonymous on April 22, 2013* -
## maths

solve the following equation by completing square x(square) + 5x - 84 Pls show steps x= or x=

*asked by Jayden Haddy on August 3, 2013* -
## algebra

Help me with this problem. Write an equation of line containing the given point and perpendicular to the give line (4-2); 9x+2y=3 help me with this.

*asked by Johnnie on March 19, 2009* -
## Geometry

Write an equation for the line with the given slpe that contains the given point. Graph each line. 1. slope 2,(2,-2)

*asked by Denzel on October 1, 2007* -
## Analytic Geometry

Find the equation of the circle, with radius 1, tangent to the line 3x+4y=5 and having its center on the line x+2y=0

*asked by xavier on January 31, 2013* -
## Geometry

The line m has the equarion y= 2x + 1. The line n is perpendicular to m and passes through the point A(2,1). Write an equation of n

*asked by Marina on January 13, 2012* -
## math

solve in three variables.. I'm very confused if what equation is the first to solve. 13y=10 x+y+z=39 16x+13z

*asked by aldren on January 15, 2011* -
## algebra

if jessica solved an equation and her answer was o=2 , explain to jessica what her result means

*asked by Anonymous on December 14, 2010* -
## algebra

which quadratic formula would be used to solve the following quadratic equation? 4x^2 - 5x = -2 can you show me the correct answer and how do it please

*asked by gabriel on June 8, 2010* -
## math

What is the product of all valid solutions of the fractional equation x/(45-5x)=1/[5(x-1)] I am guessing the answer is -9 because the two solutions would be -3 and 3 but Im not sure.

*asked by anonymous on January 20, 2017* -
## algebra

The equation f(x) = 4x2 − 16x + 9 represents a parabola. What is the vertex of the parabola? (2, −7) ( −2, 57) (4, 9) ( −4, −137)

*asked by al on April 11, 2016* -
## 8th grade math

an equation in slope-intercept form of the line ia parallel to the y-axis and has an x-intercept of 3

*asked by Anonymous on December 15, 2008* -
## Math

Give the equation of the line that passes through point (-5, -1) and is parallel to the line y = - 14x

*asked by Johnnie on November 15, 2009* -
## Math

-8y = 2x -7 +9y +7= 2x Determine whether each equation represents a direct variation. If it does, find the constant of variation.

*asked by Mike on November 28, 2016* -
## math

Give the equation of the line that passes through point (-5, -1) and is parallel to the line y = - 14x - 7.

*asked by jeng on November 15, 2009* -
## Algebra 2

Solve the equation. Round answers to the nearest hundredth. log(7x+1)=log(x-2)+1

*asked by RAD on May 3, 2012* -
## locus

if a moving point p is always equidistant from the point A(2,4) and the line y=-4, find the equation of the locus of p

*asked by zoe on July 18, 2015* -
## Algebra

Find the center and radius of the circle. Equation: x^2 + (y+7)^2=4 Formula for center at the origin is x^2+y^2=r^2 Is this what I use and how do I go about this?

*asked by Carrie on April 18, 2010* -
## math

Write an equation of a line that is perpendicular to the line y=3x-6 and goes through the point (-3,5) plz help me ...and explain how to do

*asked by Anonymous on February 16, 2009* -
## chemistry

When given qcal (2064 J), how do you calculate delta H (which equation is used)? ex. CaO+ H2O-> Ca(OH)2, what is delta H?

*asked by brenn on November 18, 2014* -
## Math

Choose any number for p. Determine whether the following equation is true. (2p-3)(p+4)=2p^2-5p-12 I don't think this is true. Am I correct?

*asked by Cherie on November 18, 2014* -
## geometry

how to write an equation in slope intercept form of the line through point P(8,20 with slope 4?

*asked by chris on May 3, 2012* -
## algebra

V=1/3*6300*7 solve for V The answer is V=14700 how do you change 1/3 to a decimal or use 1/3 to solve the equation?

*asked by jen on February 14, 2011* -
## Algebra 1A

Find the slope intercept of equation of the line that has the given characteristics. Slope 3 and y interceot 0,7

*asked by Anonymous on September 10, 2011* -
## Trig

find all solutions to the equation √3 csc(2theta)=-2 Would the answer be π/6 + 2πn, 5π/6 +2πn or π/6 + πn, 5π/6 +πn? or neither?

*asked by Bob on July 10, 2012* -
## Math

The following table shows a proportional relationship between w and z. w=18 and z=2. Write an equation to describe the relationship between w and z.

*asked by Maya on February 25, 2018* -
## boolean algebra - PLEASE HELP!!

simplify the following equation using boolean laws and rules: x=~(A(+)B) + ~(AB)+~((A(+)B)AC)+(~A)C (+) means plus in the circle ~ means not

*asked by Anonymous on February 13, 2019* -
## math

the tripled product of 6a and b^2. I got 216a^3b^6, but my teacher says that this is wrong. my equation is \(6ab^2)^3 is this wrong?

*asked by Emma on December 16, 2017* -
## Algebra

For each equarion, write the equivalent equation that expresses y in terms of x (Problem A) 3x+5x-y=5y y= (Problem B) 3x(5-x)= x-y

*asked by Kirby on September 7, 2008* -
## Analytical Geometry

Find the equation of the circle that passes through the point of intersection of the circles x^2+y^2=2x, x^2+y^2=2y and contains the point (2,1)

*asked by Dan on June 24, 2018* -
## math

find the two ordered pairs from this equation. y+x=-2 then give the ordered pair of the y intercept?

*asked by KiKi on March 28, 2010* -
## math

Solve the following equation for theta (θ) over the given domain: √3 sin 2θ = cos 2θ Domain: 0 < θ < 360

*asked by sweetG on July 5, 2008* -
## equation

what is the equation of calculating 5/90 lottery winning numbers if these numbers were selected for the first week 24-13-6-60-70

*asked by patrick on March 28, 2011* -
## Precalculus

Solve the equation for the indicated domain. sec(theta+81 degrees)=2 Theta E[0,360)

*asked by Anonymous on November 17, 2013* -
## Chemistry

N2(g) + O2(g) --> N2O5(g) (a) Consider the unbalanced equation above. What is the maximum mass of N2O5 that can be produced when 43.0 g of N2 and 43.5 g O2 react?

*asked by Jade on February 22, 2012* -
## Math

I have to solve the equation by finding a common base. 9^(x2-1)= 1/27^x Do i cross multiply and solve for x?

*asked by kim on February 4, 2012* -
## Algebra

Write the equation of a line that is perpendicular to the given line and that passes through the given point. Y-3=8/3(x+2);(-2,3) I have no clue :,(

*asked by Alexis on December 12, 2015* -
## Algebra 2

Write in standard form an equation of the line with the given slope through the given point: slope = -4;(2,2)

*asked by Heather on September 9, 2009* -
## chemistry

Express your answer as a chemical equation. Identify all of the phases in your answer. H3PO + Sr(OH)2=

*asked by joseph on March 10, 2011* -
## Geometry

Write an equation in slope-intercept form of the line through point P(6, –1) with slope 4. A. y = 4x – 25 B. y + 6 = 4(x – 1) C. y + 1 = 4(x – 6) D. y = 4x – 1 How would I do this?

*asked by Maya^.^ on March 9, 2016* -
## math grade 10

1.)Determine the x- and y- intercept of each equation. (if u can please show me a step by step answer so i understand it:) a.) 9x=54-6y b.) (x/5)-(y/10)=2

*asked by Nini on February 2, 2009* -
## Calculus

Find the scalar equation of a plane that is perpendicular to plane r=(-2,1,3)+s(0,1,1)+t(-1,0,3) and also intersects it along the line (x-3)/2=(y+1)/-3,z=1

*asked by Zac on July 29, 2014* -
## Math

Find an equation of the curve that satisfies the given conditions: (d^2y/dx^2)=6x, the line y=5-3x is tangent to the curve at x=1

*asked by Tim on July 29, 2014* -
## chemistry

When the following equation is balanced the coefficient of CaO is ... CaO + P4O10 > Ca3(PO4)2

*asked by . on March 10, 2011* -
## Math HELP

Write the equation of the line (in slop/intercept form) that has a slop of 7 and goes through the point (6,4).

*asked by David on December 13, 2012* -
## math

determine the equation of each line: a) slope 3.4 passing through point (-2, -4) b) slope -5 and y-intercept -0.7

*asked by jessica on August 18, 2012* -
## 8th grade

Consider the equation 3x+5y=k, what values could k so that the x-intercept and y- intercept on the equations graph would both be integers. explain.

*asked by Monkeylover:) on November 4, 2010* -
## Math

How do you find the equation of a line in standard form (ax+by=c where a, b, and c are integers) for the line passing through (1,5) and (-3,1)?

*asked by Anonymous on August 29, 2011* -
## Math

Determine the equation of the parabola with roots 2+sqrt(3) and 2-sqrt(3), and passing through the point (2,5).

*asked by Emily on August 23, 2010* -
## maths

solve the following equation for the value of theta between 0 degrees and 360 degrees.For 5 + 3cosec^2theta =8

*asked by njovu on February 27, 2012* -
## Math

Write an equation in slope intercept form with a y-intercept of 3 and is perpendicular to the given line

*asked by Hannah on November 21, 2013* -
## Calculus

Find an equation of the tangent line to the curve at the given point. y = sin(sin x), (pi, 0)

*asked by Nyke on November 7, 2011* -
## Math Ms Sue please help me

select the equation of the line passes through the point (2,6) and is perpendicular to the line x=4. Answers y=4 y=6 x=6 x=2

*asked by jasmine on November 30, 2015* -
## Math

Translate into an equation use x to represent an unknown number two thirds of a number is negative 28

*asked by Atavia on July 27, 2016* -
## Chemistry

H2CO3(aq)+Ba(OH)2(aq)→ Express your answer as a chemical equation. Identify all of the phases in your answer

*asked by Prosperity on December 2, 2017* -
## Math - help please

Write the equation of a line that is perpendicular to the given line and that passes through the given point. y – 3 = (x + 2); (–2, 3) A. Y+3= -3/8(X-2) B.Y-3=-3/8(X+2) C.Y-2=-3/8(X+3) D. Y+3=3/8(X-2) I am not sure how to do this problem...please

*asked by Deborah on November 23, 2012*

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