# Algebra

posted by .

HELP!
an object moves in a straight line given by s=2x^2-3t where s is in meters and t is the time in seconds the object is in motion. how long to nearest tenth will it take to move 17 meters?

my attempt
s=2t^2-3t
17=2t^2-3t
-17=-17
0=2t^2-3x-17
t=-b +or- sqrtb^2-4ac/2a
t=-(-3)+or-sqrt-3^2-4(2)(-17)/2(2)

Did I do all of the correct steps? I think I did but this is really confusing

• Algebra -

I have worked it more.....
t=3+or-sqrt9+136/4

• Algebra -

yes, you are right, but when typing on here you should use brackets to establish the correct order of operation

t = (3 ± √145)/4

I got the ± by holding down the Alt key and at the same time punching in 241 on the number key pad, then releasing the Alt key

I got the √ by holding down the Alt key and at the same time punching in 251 on the number key pad, then releasing the Alt key

I am using a PC with Firefox on XP
It did not work on my Apple IBook laptop

## Similar Questions

1. ### Algebra

Can someone help me? Do I subtract 17 on both sides and then............ The position of an object moving in a straight line is given by s=2t^2-3t, where s is in meters and t is the time in seconds the object has been in motion. How
2. ### Physical Science

I had a couple of questions for homework and I answered them the best I could. Can someone check and tell me if they are correct?
3. ### Physical Science [repost]

I had a couple of questions for homework and I answered them the best I could. Can someone check and tell me if they are correct?
4. ### Physical Science

I had a couple of questions for homework and I answered them the best I could. Can someone check and tell me if they are correct?
5. ### math

the position of an object moving in a straight line is given by s=tsquared-8t, where s is in feet and t is the time in seconds the object has been in motion. how long(to the nearest tenth)will it take the object to move 10 feet?
6. ### physics

1. An object traveling at a constant speed of 22m/s begins to experience a force of 15N in the opposite direction of its motion. (Hint given: Start by finding objects acceleration) a. How long will it take for the 8kg object to come …
7. ### College Math

Another question which is confusing. The position of an object moving in a straight line is give by s=2t^2-3t, where is s in metres and t is the time in seconds the object has been in motion.. how long will it is take the object to …
8. ### Calculus-derivatives

Explain how to do these questions~ 1. An object moves in a straight line with its position at time t seconds given by s(t) = 3-2t+t^2, where s is the measured in metres. At what time is the object not moving?
9. ### math

The position of an object moving in a straight line is given by the function , where s(t) represents distance traveled and t represents the time the object has been in motion. How long (to the nearest tenth) will it take the object …
10. ### Algebra

The distance traveled by an object moving in a straight line is given by s = t2 − 2t, where s is in feet and t is the time in seconds the object has been in motion. How long (to the nearest tenth) will it take the object to move …

More Similar Questions