x = -8, 8
Step-by-step explanation:
Set y = 0 to find the x intercepts
0 = x^2 -64
Add 64 to each side
64 = x^2
Take the square root of each side
±sqrt(64) = sqrt(x^2)
±8  =x
10.416 meters per second
step-by-step explanation:
distance=1 00 meters
time= 9.6 seconds in decimal form or 9 3/5 as a mixed number
average speed= 100/9.6
=10.416 meters per second or 10 52/125 as a mixed number.