SOLUTION: Can someone help me with this problem? I'm not good with algebra at all. The function D (t) = 11t to the second power � 130t gives the distance a car going a certain speed wil

Question 418144: Can someone help me with this problem? I'm not good with algebra at all.

The function D (t) = 11t to the second power � 130t gives the distance a car going a certain speed will skid in t seconds. Find the time it would take for the car to skid 170 feet.
The time to skid 170 feet is __________ seconds.
(Round to the nearest tenth.)

Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
11t^2-130t=170
11t^2-130t-170=0
t=13 seconds
.
Ed
.

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=24380 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 13.006407361557, -1.18822554337521. Here's your graph:

RELATED QUESTIONS
Can someone please help me out, howevever i am not good in algebra at all, especially... (answered by josmiceli)

I am not the whiz kid concerning algebra and I need all the help I can get...if someone... (answered by stanbon)

I am trying to help my son with an algebra problem (he is struggling,especially with word (answered by sofiyac)

Can someone help me with this problem I have to evaluate the expression -3to... (answered by jim_thompson5910)

Hello all Yes I am back in an algebra class and I need some serious help again. I would... (answered by stanbon)

Can someone please help me I need help by solving this math problem. I'm getting the... (answered by josgarithmetic)

Solve by the substitution method. 4x+7y = 34 -3x+y = 12 Can someone please HELP (answered by checkley77,vleith)

Rewrite each equation as a function of x. -3x +4y = 11 I do not understand how to... (answered by ankor@dixie-net.com)

Could someone help me with this one please. Which of the following is not a... (answered by scott8148)