Answer:
X=9
Step-by-step explanation:
It's D ...
hope it helps
x=9/4
we have:
(4x + 15) = 24
4x=24-15
4x=9
finally: x=9/4
Answer:10 Seconds
s=1600 ft
t=√(s) /4
t=√(1600)/4
t=40/4
t=10 seconds