WILL MARK BRAINLIEST!! The equation 8 = 2 √ 5x can be used to estimate the speed, s, of a car in miles per hour, given the length in feet, x, of the tire marks it leaves on the
ground. A car travelling 90 miles per hour came to a sudden stop. According to the equation, how long would the tire marks be for this car?
A.380 feet
B.430 feet
C.355 feet
D.405 feet

Step-by-step explanation:

Help plsss

ok

step-by-step explanation:

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct