# 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 31-
## Math Terminology

Identify all the components of this statement: 3a + 2b = 7 Is this an equation or an expression and why? constant variable term expression equation I believe it is an equation because it has an equal sign I believe the constant is 7 because that never

*asked by Marina on January 16, 2016* -
## Math

For f(x) = 2x-3 and g(x)= 2x^2 find, a) (f + g)(x) = My answer is 2x^2 + 2x - 3. Is this correct? b) (f - g)(x) How would you do this? c) (f X g)(2) I do not know what to do since the 2 is there. Determine whether the graph of the following equation is

*asked by Hannah on October 6, 2010* -
## Math(Please, Please, help)

For f(x) = 2x-3 and g(x)= 2x^2 find, a) (f + g)(x) = My answer is 2x^2 + 2x - 3. Is this correct? b) (f - g)(x) How would you do this? c) (f X g)(2) I do not know what to do since the 2 is there. Determine whether the graph of the following equation is

*asked by Hannah on October 7, 2010* -
## Chemistry

I am using 85% ACS grade phosphoric acid. I need to make a 21% phosphoric acid solution with a total volume of 250ml. I have been told that 37ml of the 85% ACS grade phosphoric acid plus 188ml of Deionized water will create the 21% phosphoric acid solution

*asked by Melissa on December 9, 2016* -
## math

10 people are going canoeing/tubing. some people will tube, some will canoe. tubes are $7 each. canoes are $11 each. tubes hold one person. canoes hold three. if you want to spend exactly $50, how many canoes and tubes can you buy? what would be the

*asked by paige on October 17, 2007* -
## 7th grade math

Choose the equation that you can use to solve the problem. 1. 86 is 45% of what number? 86 = 0.45n N = 0.45 x 86 0.45 = n x 86 86 = 45n Choose the equation that you can use to solve the problem 2. What percent of 26 is 4? 0.26 = n x 4 n = 0.26 x 4 4 = n x

*asked by -.-hello on February 5, 2019* -
## Physics

How much work must be performed by a hand or other such agent to move the 8kg block very slowly 10 cm to the right if the attached spring was initally relaxed? Let k = 200 N/m and mK = 0.5. Show the equation and the plug the numbers into the equation and

*asked by Anonymous on October 26, 2016* -
## chemistry

Consider this balanced equation 3H2+CO -> CH4+H2O. how many moles of CH4 can be obtained by reached 2.0mol of H2 with 2.0molCO according to this equation? > You need three times as many moles of H2, as CO. Since there are equal moles of H2 and CO

*asked by Faix on August 23, 2005* -
## Pre-Calc

An open box with a volume of 1500cm^3 is to be constructed by taking a piece of cardboard of 20 cm by 40 cm, cutting squares of sides length x cm from each corner and folding up the sides. Show that this can be done in two different ways, and find exact

*asked by Andy G on January 14, 2014* -
## Chemistry

For each of the following, write a net ionic equation (modeled above). Wherever there is a precipitate, state the name of the precipitate (e.g “lead iodide” from above). Pop onto the net and see if you can find a description of the physical properties

*asked by Noelle on September 2, 2010* -
## Algebra 1 (Ms. Sue)

1). Solve each equation. 17 = w - 4 2/3s = -6 1/3y + 1/4 = 5/12 x/8 - 1/2 = 6 5/6x - 1/3 = 5/2 2). In 1668, the Hope diamond was reduced from its original weight by about 45 carats, resulting in a diamond weighing about 67 carats. Write and solve an

*asked by Anonymous on September 11, 2013* -
## Math

What is the real value of x in the equation log(subscript 2)24-log(subscript 2)3=log(subscript 5)x? I really cannot remember at all how logs work. I know the answer is 125 but have no idea how to get there. Thanks in advance.

*asked by Natalie on November 17, 2007* -
## Algebra 1 (Reiny or Kuai)

1. The school band sells carnations on Valentine's Day for $2 each. They buy the carnations from a florist for $0.50 each, plus a $16 delivery charge. a. Write a system of equations to describe the situation. A: y = 2x; y = 0.50x + 16. b. Graph the system.

*asked by Please, help me! on December 9, 2013* -
## Algebra

The vertex of a parabola is at (-2,4), and the x-intercepts are at -6 and 2. Determine the domain and range of the function. a. D: all real numbers R: all real numbers b. D: all real numbers R: y ≤ 4 c. D: -6 ≤ x ≤ 2 R: y ≤ 4 d. D: x ≤ 4 R: all

*asked by Emma on July 4, 2014* -
## pre-calculus

solve the logarithmic equation. be sure to reject any value of x that is not in the domain of the orginal logarithmic expression. In square root of x+2=2 (If I try to make the square root sign it will not come out right so I wrote it out instead) What is

*asked by ladybug on October 6, 2012* -
## Chemistry

Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. U^4+ --> UO2^+ There is a hint: In acidic solution, you may add H2O and H as needed to balance oxygen and hydrogen. When finished,

*asked by Clueless on April 28, 2014* -
## mixture

Sugar solution is composed of 40 grams of sugar and 200 grams of water. How many grams of sugar must be added to make a 60% sugar solution? (Kindly write the equation..... tnx)

*asked by HELP HELP MNHS on November 22, 2012* -
## Chemistry

When an aqueous solution of sodium hydroxide, NaOH, is added to an aqueous solution of chromium(III) nitrate, Cr(NO3)3, a precipitate of chromium(III) hydroxide, Cr(OH)3, forms. Write a balanced net ionic equation for this reaction.

*asked by Tina on March 1, 2016* -
## Chemistry

Only a chemist can be trusted with the combination to the safe containing a ton of money. The combination is the pH of solution A, followed by the pH of solution C. (for example: is the pH of solution A is 3.47 and the pH of solution C is 8.15 the

*asked by Dan on April 30, 2007* -
## chemistry

how many grams of CaCl2 need to be dssolved in 100g of water to prepare a solution which freezes at -2.0 degrees? Work this problem just like the previous one EXCEPT there is another part to the formula. Delta T = i*Kf *m i is the number of particles and

*asked by jessica on May 31, 2007* -
## algebra

how would i find an equation of a line that goes through points(1,6) and (3,10)?? thanks A straight line is y=mx+b Substitute the points to make two equations. 6=m(1)+b 10=m(3)+b Two equations; two unknowns, m and b. Solve for m and b, then plug back into

*asked by jasmine on December 22, 2006* -
## MATH

cos(x)=2 and sin(x)=5 Thanks for your previous answers mathmate. No. It's not a typo. I was wondering if someone could explain to me when in real life would I need to solve such problems, or similar, besides answering problems from a textbook. When ever I

*asked by George on July 15, 2011* -
## math

Could someone please check my work? I would really appreciate any help! here are the instructions ~~ Write an equation to represent these real-life situations in which the variable is on the left side of the equation with an operation and a number. Then

*asked by Abby on September 21, 2015* -
## math

Solve the system of equations by graphing. Then classify the system? y= -x -11 4x -3y=-2 What is the solution of the system? (Type an ordered pair. Type N if there is no solution. Type R if the solution is all real numbers.)

*asked by micheal on June 16, 2009* -
## math

Solve the system of equations by graphing. Then Classify the system? 4u+v=1 4u=v+7 What is the solution of the system? (Type an ordered pair. Type N if there is no solution. Type R if the solution is all real numbers.)

*asked by micheal on June 16, 2009* -
## chemistry

A solution is made by dissolving 46.5g of urea, (CH4N2O) a nonelectrolyte, in 316g of water. Calculate the vapour pressure of this solution at 40 oC. (ans in torr, note the vapour pressure of pure water at 40 oC is 55.3 torr.) I have been struggling with

*asked by wini on February 17, 2011* -
## Pre-Cal

An equation is given. (Enter your answers as a comma-separated list. Round terms to three decimal places where appropriate. If there is no solution, enter NO SOLUTION.) 2 cos 2θ − 1 = 0 a). Find all solutions of the equations answer--> θ= (π+6nπ)/6 ,

*asked by Amber on July 11, 2016* -
## Chemistry

When we mix NaOH and H2SO4 we get the equation OH-(aq) + H+(aq) --> H2O(l) and if we mix H2CO3 and NaOH we get the equation 2OH-(aq) + H2CO3 --> 2H2O(l) + CO3-2(aq) Why aren't the two equations the same? ie only one mol of NaOH reacts in the first equation

*asked by Fiona on May 12, 2007* -
## Calculus

Please help this is due tomorrow and I don't know how to Ive missed a lot of school sick Consider the curve given by the equation x^3+3xy^2+y^3=1 a.Find dy/dx b. Write an equation for the tangent line to the curve when x = 0. c. Write an equation for the

*asked by Jessica Chaney on March 1, 2012* -
## chemistry

The kinetic theory of gases is based on a number postulates from which the equation P= 1/3× N/V×m×µ² is derived (P is the pressure of the gas, N the number of molecules in the container, m the mass of each molecule and µ² is the mean square speed).

*asked by Taylor on January 1, 2014* -
## physics

for the current density equation (I) , solve for dV/dx when I = 0 I = - [ uz2F[C] dV/dx + uzRT d[C]/dx] According to your equation. dV/dx= uzRT/uz2[C] d[C]/dx I am uncertain what your symbols mean. It's supposed to be the current density equation I think??

*asked by Ann on January 23, 2007* -
## Math (Mrs. Sue, please help?)

An equation is shown below: 4(2x - 5) = 4 Part A: How many solutions does this equation have? (4 points) Part B: What are the solutions to this equation? Show your work. (6 points)

*asked by Reb on April 24, 2016* -
## General Chemistry

Calculate the standard heat of formation of acetaldehyde , 2C(s) + 2 H2(g) +1/2 O2 (g) ---> CH3CHO(g) given the following information? CH3CHO(g) + 5/2 O2 (g) --> 2H2O(l) + 2 CO2(g) DeltaH rxn =-1194 KJ H2(g)+ 1/2 O2 (g) --> H2O (l) DeltaH rxn =-286 KJ/mol

*asked by ChemLove on November 20, 2015* -
## Algebra

in x^2+14=0, how many solutions do we have? A)2 real solutions B)1 real solution C)2 imaginary solutions Im guessing A

*asked by Ally on December 11, 2010* -
## Chemistry

The equation is: CuSO4(s) + Zn(s) -> Cu(s) + ZnSO4(aq) 3.22 g of powdered zinc is added to 200ml of 0.5M copper sulfate solution. What mass of copper is deposited? Hi guys. I am confused about the stoichmetry question. Q: The equation is: CuSO4(s) + Zn(s)

*asked by G on October 10, 2015* -
## math

graph the equation by plotting the points: 35-5y=0 i know how to put the solutions on the graph. i am stuck on this equation. i think x=0 but i can not figure for y. please help me and show me the steps to solve this.

*asked by barb on August 19, 2010* -
## algebra

Which choice is the equation of a line that passes through the point (–6, –2) and is perpendicular to the line represented by this equation? y = −3x + 1 A. 3x + y = 1 B. y = 1/3x C. y = −3x D. −3y = −x + 1 isn't the answer to this B, since the

*asked by caduceus on November 10, 2013* -
## Math

36 is equal to 45% of a number n. Write and solve an equation to find n. Write the percent as a decimal. Equation=? n=? My friend and I are both stumped on this question.

*asked by Madeline on November 5, 2016* -
## algebra

the linear equation y=0.15x+0.79 A)what year would be represented by x=4? B)What x-value represents the year 20018? C)what is the slope (or rate of change) of this equation? D)what is the y-intercept?

*asked by Patty G on July 18, 2009* -
## Physcis

Determine the acceleration of the marble from the straight line equation you calculated in question 2. So the equation i found in Q2 was y=9.84x+6.79 How do i figure out acceleration from this? please help!

*asked by Anonymous on November 5, 2011* -
## Math Linear Equations

Two lines are drawn on a co-ordinate axis. The equation of the first line is y=-2,and the equation of the other line is y=3x+1. What are the co-ordinates of their intersection point? I have been on this for hours and can't figure out how to do this. Please

*asked by Cherie on January 2, 2015* -
## Urgent Chemistry question!

How do i combine 2 half ionic equations into an overall equation?? 4OHˉ → 2H2O + O2 + 4e 2H+ + 2e → H2 *The "H+" is the hydrogen ion The correct overall equation is 2H2O → 2H2 + O2 How do i get that???

*asked by Marrion on October 19, 2009* -
## algebra 2

Directions: The focus and directrix of a parabola are given. Write an equation for each parabola. (2,4) y = 6 May you explain the procedures on how to solve this equation? Please be detailed on each step.

*asked by meg on April 2, 2008* -
## Math

Geometric series: Finite and infinite n=5 a1=243 r=2/3 i=1 This is the equation 243(2/3)^i My answer is 633 n=infinity sign a1=5 r=-1/4 i=1 The equation 5(-1/4)^i-1 I think its undefined

*asked by Aria on June 1, 2017* -
## Algebra

Find an equation of the line having the given slope and containing the given point. M=4/5, (7,-8) I can totally due the equation y+8=4/5x-28/5 but keep getting the answer wrong. I cannot figure out how subtracting 8 they get the answer y=4/5x-68/5 PLEASE

*asked by Tammy on June 14, 2011* -
## Statistics

Four pairs of data yield r=0.942 and the regression equation y-hat=3x. Also, y-bar=12.75. What is the best predicted value for x=4.3? I know that the answer is 12.5, but how do you know to use the y-bar value instead of plugging the x value into the

*asked by Stella on December 2, 2014* -
## math

Jack measured the height of tree he planted and wrote an equation to describe its growth. The equation he wrote is: y = 6x + 10. Which of the following statements would be true?

*asked by Dylan fridley on March 14, 2019* -
## MATH

If the demand function for a commodity is given by equation p^2+12q=18 and the supply function is given by the equation 700-p^2+6q=0, find the equilibrium quantity and price

*asked by tracy on June 15, 2015* -
## Pre-calc

Find the effective rate of interest for 5.25% compounded quarterly. I don't know how to solve this. Would I use this equation A=Pe^(rt) But still I don't know because even if I put the given info into the equation I still need P and A

*asked by Amy on January 12, 2011* -
## Algebra

Solve the equation w=Cr^-2 The weight of an object follows this equation. Where C is a constant, and r is the distance that the object is from the center of the earth. There are too many variables for me to know where to begin. Can someone get me started?

*asked by Marysvoice on January 28, 2008* -
## Pre-Calc

Can someone please be kind and show me the steps on this? Thanks Find the equation of the circle centered at the origin in the uv-plane that has twice the circumference of the circle whose equation equals (u-5)^2 + y^2 =9

*asked by Ann on December 7, 2010* -
## algebra review

find the y-intercept of a line that passes through (2,1) and has a slope of -5. i forgot what equation i have to use to find this out. can someone give me which equation i have to use? or all the equations that deal with slopes please

*asked by trixie on September 3, 2009* -
## ALGEBRA

How do you solve the rational equation: (n/n-2)+(n/n+2)=(n/n^2-4) I know that the LCD of the equation is (n+2)(n-2) because that is what you get when you factor out the n^2-4 in the last part of the question. I thought I did it right until I reached the

*asked by Katie on April 15, 2008* -
## Algebra

I've been trying to figure out this equation for over an hour but all the answers I get are wrong. The equation is 0.9=-10I^2+6I . The answer is supposed to be 0.3 and it does work out, but I have tried all different ways to solve for I and nothing seems

*asked by Amy on January 12, 2008* -
## Chemistry

It says to write the balanced equation for the complete combustion of cyclobutanol in Oxygen. I'm not even sure what the product is supposed to look like so how can I balance the equation? Please help. C4H8O + O2 ---> C4H8O

*asked by Casey on July 11, 2010* -
## Math

Write the equation of the line that satisfies the given conditions. Express the final equation in standard form. Contains the point (-8, 5) and is perpendicular to the line 2x − y = 4

*asked by John on October 26, 2017* -
## Math

1. Solve the equation -5y-9=(y-1) A. -1/2 B. -2 1/2

*asked by Petter on August 20, 2017* -
## Algebra

Write the equation of the line L satisfying the given geometric conditions. L has y-intercept (0,-3) and is parallel to the line with equation y=2/3x+1 I will be happy to critique your work on this. y=(2/3)x-3?

*asked by Linda on May 20, 2007* -
## Math

Here is the problem. I got the answer but I would like a better understanding. Find the equation of a line that passes thru(6,-2) and is perpendicular to equation x-3y+16. I got the final answer being -3x+16. Can someone please explain how to get this? I

*asked by Jenn on April 25, 2016* -
## Math

Write the equation of the line that satisfies the given conditions. Express the final equation in standard form. Contains the point (-7, 2) and is perpendicular to the line 4x − y = 4

*asked by kylee on September 30, 2015* -
## Math

What is an example of an equation for Celsius to Fahrenheit? I completely forgot the equation since i spend too much time doing summer things, but this is for Summer School, Please help me understand it again.

*asked by Losa on June 11, 2012* -
## advanced math

Hi, I am trying to solve graphing quadratic equations. One of the problems is written as -x^2= -2x-1. So if I wanted to put this equation in the proper quadratic equation form, would it be -2x-1-x^2, or -x^2+-2x-1? I'm really not sure.

*asked by Sharon on March 2, 2008* -
## algebra again

Write an equation that passes through the points (4, 3) and (2, -2) I have -2 -3 is -5 and 2-4 is -2 so y equals -5/2x plus b. I put in 2,-2 into the equation to get the y intercept, so 2 equals -5/2 times 2 plus b -5/2(2) is -10/-4 reduce to -5/-2 Now add

*asked by Elisa on September 26, 2009* -
## math

Pls help. The question is : Blake the rabbit has a ramp with equation 2y + x = 7. His friend at the pet shop has a ramp with equation y = 12 – 0.5x. Will the rabbits ever meet?

*asked by Usman on March 30, 2019* -
## Science

A jet aircraft is traveling at Mach 2.5 through air at 1 °C. What is the jet's speed in m/sec? I can do the equation myself, I just need to know what equation I need to do in order to find the answer.

*asked by Elisabeth on April 3, 2013* -
## math,correction

can someone correct this for me plz.... Write the equation of the line L satisfying the given geometric conditions. (#1)L has y-intercept (0, -3) and is parallel to the line with equation y = (2)/(3)x + 1. My answer:

*asked by jasmine on January 22, 2007* -
## algebra 1

parallel and perpendicular lines write the slope-intercept for an equation of the line that passes through the given point and is perpendicular to the graph of each equation (4-2) y=1/2 +1, ( 2,-3) y= -2/3+4 (-8,-7) y=-x-8 (6,-2) y=-3x-6

*asked by Katherine on January 9, 2014* -
## calculus

writing an exponential equation The function gives the value of a home in dollars in the year 1980 + t. Write an equation that can be used to determine the year in which the value of the home reached $100,000? Use ^ to denote an exponent. Do not solve the

*asked by Joshua on September 5, 2006* -
## math

The sum of the ages of Diego and Carissa is 67 years. 11 years ago, Diego's age was 2 times Carissa's age. How old is Diego now? Translate the given information into an equation using the variable x = current age of Diego. Your equation should contain 67,

*asked by Anonymous on October 24, 2015* -
## Math-Geometry

I'm having trouble with these two questions about slopes and equation of a line: (A)-Find the slope of each segment (B)-Write an equation of the line that is determined by each pair of points 1. (0,0) and (6,-4) 2. (-3,2) and (7,-4) Thank you!

*asked by Sammi on February 20, 2010* -
## Math

Marge said that she subtracted 20 from both sides of an equation to solve it. Kollin thinks that the equation she was solving could have been 6+t=20. Does Kollin's reasoning make sense? Explain.

*asked by Sean on February 6, 2018* -
## Pre-Algebra

Can someone show me how to answer these questions step-by-step? Thanks! Solve the equation for y in terms of x 1.2x + 7= y 2. x- 2/3y= 3 3.-12x + 3y = 48 Give any three ordered pairs that are solutions of the equation 4. -1/4y - x =0 5. 5x - y= -5 -MC

*asked by mysterychicken on May 5, 2009* -
## Calculus

Using separation of variables, solve the following differential equation with initial conditions dy/dx = e^(2x+3y) and y(0) = 1. Hint: use a property of exponentials to rewrite the differential equation so it can be separated

*asked by Nick on August 14, 2018* -
## chemistry

Determine whether a solid forms when solutions containing the following salts are mixed. If so, write the ionic equation and the net ionic equation. KCl and Na2S

*asked by Kaitlyn on October 27, 2013* -
## math- please help

a copy machine makes c copies in m minutes according to the equation c=60m. what is the unit rate of copies per minute? I think it is m but not sure, can you help me understand how to figure out this equation. Please help! Thanks

*asked by Ellie on March 28, 2013* -
## Algebra 2

What's the formula given three points to come up with the quadratic equation were your give points (x1, y1 ) (x2, y2) (x3, y3) I remember seeing some really long equation were you just plug the numbers into it and get your answer but I have forgotten the

*asked by Algebra 2 on June 11, 2009* -
## Maths - Linear Relations Simple Problem

Find the values of m for which the line with equation y=mx+2 does not intersect the parabola with equation y=(x-1)^2 + 5. I am not sure how to solve this problem. I know that both equations equal each other when it intersects but what happens if they don't

*asked by Cliff on December 22, 2016* -
## algebra

Find the value of y so that the line passing through the two points has the given slope? 1. (12,y), (-6,9/7), m= -1/6 _____________ write an equation in slope-intercept form. (then graph the equation). 2. 18y+2x-9=0 3. 3x-4y=-8

*asked by Anonymous on October 8, 2009* -
## Algebra

Write an equation for the line that passes through (-9,7) and whose slope is undefined.Write the equation in the standard form where all coefficients are expressed as relatively prime integers.

*asked by Anonymous on September 26, 2018* -
## Math

I need help with how to do these problems.. SOLVE THE EQUATION USING THE ZERO PRODUCT PROPERTY -8n(5n+3)=0 SOLVE THE EQUATION BY COMPLETING THE SQUARE.. ROUND TO THE HEAREST HUNDRETHS X^2-3x=4 4x^2+4x-24=0 Thank you... I don't get how to do these please

*asked by Amy on May 18, 2009* -
## math

Not sure about this... Need to solve by substitution 8x - 4y = 16 y = 2x -4 Substitute 2x -4 for y in the first equation and solve the resulting equation for x. 8x - 4(2x-4) = 16 16 = 16 The two equations are not independent. One can be derived fron the

*asked by Janna on August 8, 2007* -
## math

a copy machine makes c copies in m minutes according to the equation c=60m. what is the unit rate of copies per minute? I think it is m but not sure, can you help me understand how to figure out this equation. Thanks

*asked by Ellie on March 28, 2013* -
## algebra 2

how to write this equation $45.00 is the total amount of money that i have to split. i need to buy meat one coast is 1.80 a pound and the other 1.00 per poung how can i write this equation to get the answer?

*asked by yukary on September 5, 2010* -
## math 117

5/(x+6)+ 2/(x^2+7x+6)= 3/(x+1) Rewrite x^2 +7x +1 as (x+6)(x+1) Multiply both sides of the equation by that expression. You get 5(x+1) + 2 = 3(x+6) Multiply out the parentheses and combine similar terms. You will be left with a simple linear equation for

*asked by Diana on July 11, 2007* -
## Calculus

The graph of the equation is x^2+xy+y^2=9 a) What is the equation of the right most vertical tangent? b) That tangent touches the ellipse where y= what? I've calculated the derivative to y'=(-y-2x)/(2y+x) and I found the horizontal tangents. How do I do

*asked by Anonymous on February 28, 2017* -
## Math(can you just check my answer please)

Lines x and y intersect to form angles 1,2,3, and 4. The measure of angle 3 is (3x - 9) and angle 4 is 111 degrees. Can you help me make a equation I think the equation is 3x-9 + 11 = 180 is this correct

*asked by Sofie on April 20, 2011* -
## algebra

suppose you want to add a sprinkler system, and location of one section of the ssprinker line can be described by the equation y=1/2x-4 complete the table for this equation x y (x,y) -1 -2 -4 2 8 PLEASE HELP ME SOLVE THIS TABLE!!!!!!

*asked by pj on October 24, 2008* -
## calculus

c)The price (in dollars) p and the quantity demanded q are related by the equation: p2+2q2=1100. If R is revenue, dR/dt can be expressed by the following equation: dR/dt=A(dp/dt), where A is a function of just q. i)Find A. ii)Find dR/dt when q=20 and

*asked by chamberlain on October 27, 2012* -
## Algebra

Show equation AX=B represents a linear system of two equations in two unknowns. Solve the system and sustitute into the matrix equation to check results. A=|1,2| |-3,5|, X=|x[1]x[2]|, B=|-4 12|

*asked by mike on December 17, 2009* -
## trip

for sin2x+cosx=0, use double-angle or half-angle formula to simplify the equation and then find all solutions of the equation in the interval (0,2Pie)

*asked by bob on March 16, 2011* -
## math

Write the equation of a line that goes through (5,3) and (2,7) I found the slope of the line to be -4/3 Then, I substituted one of the points in for x and y to be: y = -4/3x + b 3 = -4/3(5) + b 3 = -20/3 + b 3 + 20/3 = b This is where I am stuck == do I

*asked by Sami on March 26, 2018* -
## Inequalities

Shelby's test scores are 99, 91, and 85. If she must average at least 90 points to get an A in the class, what must she earn on the next test? Okay so this was my equation but it came out completely wrong. 99+91+85+x greater than or equal to 90 So what

*asked by Kendra on September 9, 2010* -
## math

a) 3(x+1)+x+2=2(2x+1)+3 I distributed the equation and got 5=5 as my final answer. b) DON'T UNDERSTAND is the resulting equation from part (a) always true,sometimes ture, or never true? Explain your reasoning.

*asked by math help on November 23, 2012* -
## Please answer these questions Algebra 1

16. Use the quadratic formula to solve the equation. 〖5x〗^2 - 47x = 156 18. What are the solutions to the equation x2 – 4x = -1? 19. Graph the set of points. Which model is most appropriate for the set of numbers? (1,3), (0,0), (-3,3), (-1,-1),

*asked by Anonymous on May 19, 2016* -
## chemistry

write the equation of the neutralization of sulfuric acid (H2SO4) with potassium hydroxide (KOH) and write the net ionic equation for the reaction

*asked by Doss on October 25, 2011* -
## math

equation d=55h the distance a person drives when traveling 55mph. (h=time in hours, d+ distance in miles.Use equation to complete the table.)

*asked by jennifer on September 13, 2012* -
## Math

Find an equation of the line containing the given pair of points. (-5,-2) and (-3,-1). The equation of the line in slope-intercept form is y=. Here is what I came up wiyh: y=1/2x-1/2. Is this correct? I am confused on this problem. Could someone please

*asked by B.B. on March 26, 2010* -
## math

True or False. A data set resulted in a regression equation of Y = 17.08 - 1.16x From the equation we can determine that the X variable is directly related to the Y variable.

*asked by Barbara on September 14, 2008* -
## Math

Each letter in the equation below represents a different digit from the set {1,3,4,7,8}. Find the value of each letter to make the equation true. ADD +MAD _____ SUM

*asked by Butch on March 10, 2008* -
## Math help

Write an equation with a variable on both sides of the equal sign that has infinitely many solutions. Solve the equation and explain why it has an infinite number of solutions.

*asked by Katalina on January 14, 2014*

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