Answer: X=18
Explanation: 42 - 18 = 24
24 multiplied by 2 = 48
I think you are correct actually.
Answer: 38 feet.
Step-by-step explanation:
The equation of motion of a body thrown vertically upwards:
,

Substitute in formula (1) the value t=2 c:

The answer would be 40
-4(-2) = 8
8(5) = 40