What is the answer to the problem i am very

The time of takeoff of this hovercraft would be 0 seconds, as if you were starting a timer. So, if you plug in 0 for x (unit for seconds) in your equation, it will look like this:

h(0) = -3(0 - 3)² + 108
Parenthesis first
h(0) = -3(-3)² + 108
Exponents next
h(0) = -3(9) + 108
Multiplication
h(0) = -27 + 108
Combine like terms

h(0) = 81: The height of the hovercraft at the time of takeoff is 81 meters!
Hope this helps :)

James, approximately has:

5 pairs of running shoes

7 pairs of basketball shoes

Step-by-step explanation:

3s = 4b      eq. 1

s + b = 12    eq. 2

from eq. 2:

s = 12 - b     eq. 3

Replacing eq. 3 in eq. 1:

3(12-b) = 4b

3*12 + 3*-b = 4b

36 - 3b = 4b

36 = 4b + 3b

36 = 7b

b = 36/7

b = 5 (aprox)

from eq. 2

s + 5 = 12

s = 12-5

s = 7 (aprox.)