1,081 Answered Questions for the topic Equations

Equations

04/07/16

At a concert, you purchase 3 T-shirts and a concert program for $90. The program cost $15. How much did each T-shirt cost?
What would be an equation for that problem?
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Equations

04/06/16

If f(x)= 3x and g(x) = 2x +5, at which value is f(x) < g(x)?
If f(x)= 3x and g(x) = 2x +5, at which value is f(x) < g(x)?
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Equations

03/31/16

How many points did he score from shooting field goals?
Curry had a great basketball game last night. He scored 56 points. He made 7 free throws.    Each free throw is worth 1 point. The rest of the points he scored were field goals, either 2-point or... more
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Equations

03/29/16

find an equation of the line
Find an equation of the line through (5,2) and is perpendicular to y=5x-9
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03/28/16

Equation of circle given center and tangent line
Write the equation for a circle which has its center at (1, 2) and is tangent to the line -3x+2y= 14 Solve algebraically.   I know that the equation of a circle is r2=(x-h)2+(y-k)2. So, at this... more
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Equations Algebra Solving

03/28/16

Help solving these equations?
The formula for the kinetic energy of a moving object is E = 1/2mv, where E is the kinetic energy in joules, m is the mass in kilograms, and v is the velocity in meters per second.   1- solve the... more
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Equations Math

03/26/16

what's the value of k
k(10x-5)=2(3+x)-7   If the equation above has infinitely many solutions and k is a constant, what's the value of k?
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03/20/16

Solve 2cot(?^(2))x = 5 - cosec x
I don't find an answer for this question matching the solution, please help me out!  The range is 0 to 2π   Solve 2cot2x = 5 - cosec x
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03/19/16

Prime numbers
is there an easier way to find out how many prime numbers are under 100 without going through each number? Thanks!
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Equations

03/15/16

How do i solve y/9=-2
I'm trying to help my son with 7th grade math
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Equations

03/12/16

The total perimiter of a rectangle is 30 inches. If the lenght is three times the width, what is the length?
This question has to do with math. It's an equations that testes your ability to write equations. 
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03/07/16

Linear Systems
A total of 450 shares worth $2100 was invested in the stock market. Some "World Oil" shares were bought at $7.50 each. Some "Zinco Mines"  were bought at $3.25 each. How many shares of each company... more
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Equations Trigonometry

03/06/16

Solve this equation 15+21 sin (x) = 20 cos^2 (x) , where 0 degrees less than and equal to x and less than 360 degrees
Solve the equation 15+21 sin (x) = 20 cos^2 (x), where 0 degrees is less than and equal to x and x is less than or equal to 360 degrees. Round to thw nearest hundredth of a degree.
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03/06/16

Finding x and b in the following
Find x so that the given points are collinear. (9, -12) (13, 4) (x, 14)   A line with slope of -4 contains the points (2, -8) and (7, b). What is b?  
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Equations

03/03/16

ALEXA STARTED A RACE WITH A 50 METER HEAD START. She ran at a rate of 6.25 meters per second. After how many seconds was Alexa 200 meters past the starting line
can you please answer this question
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03/02/16

How do I turn this perpendicular line into standard form? y = -1/3x + 2/3
I had to turn the equation, y - 3 = 3(x + 1), into a perpendicular line that passes through (5,-1) and I got y= -1/3x + 2/3 which I think is correct. I just don't know how to turn it into standard... more
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Equations

02/28/16

Kevin rides 11.5 mph. Write an equation for Lauren who rides twice as fast as Kevin. Use y to represent the number of miles Lauren travels in x hours
Write an equation. 
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Equations

02/25/16

PLEASE HELP!!! TEST PREP HELP!!
Over a period of three weeks, Charles has saved $196. The first week he saved $42. For the next to weeks, the amount of money he saved was the same. Which equations correctly represent w, the... more
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Equations Distance

02/25/16

I travelled from A to B at 100km/h. This trip would take me 3 hours more at 80km/h. How far is it from A to B?
I travelled from A to B at 100km/h. This trip would take me 3 hours more at 80km/h. How far is it from A to B?
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02/25/16

Hi I was wondering how to create an equation of the form y=Ae to the power of Bx using the values in the table
Hi I was wondering how to create an equation of the form y=Ae to the power of Bx using the values in the table. X values are 0,1,2,3,4,5,6,7 and the log y values are 0.693, 1.193, 1,693, 2.193,... more
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Equations

02/22/16

half-life equation
The half-life of cesium-137 is 30 years. Suppose that we start with 90 grams of cesium-137 in a storage pool. How many half-lives will it take for there to be 10 grams of cesium-137 in the storage... more
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Equations Pre Algerbra

02/21/16

Help me write and solve an equation, please?
You are a member of your local movie theater's club. Every time you see a move at the theater, you earn 2 advantage points. When you earn 100 points, you get a free movie pass. Currently you have... more
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02/21/16

Solve the formula for the surface area of a cylinder, S = 2pr2 + 2prh, for h.
Solve the formula for the surface area of a cylinder, S = 2(pi)r2 + 2(pi)rh, for h. 
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02/21/16

You have $59.95 in your wallet, and you want to buy some new CD's. If the CD's are $11.99 each, what number of CD's, x, can you buy?
For this question I have to write and solve an inequality. This is off of my study guide, and I am not very good at it. Can somebody please show me the steps of how to write and solve this... more
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Equations

02/15/16

Billy is 6 yrs younger than Amy. The sum of their ages is 22. How old will each one of them be in 8 yrs?
x=Amy and y= Billy
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