Answer:
second option
Step-by-step explanation:
The perimeter P is the sum of the 3 sides, then
P = 4x² + 3 + 2x - 5 + x + 11 ← collect like terms
= 4x² + 3x + 9
You would multiply 8m by m and 6 separately. it would be 8m^2 + 48m
Height would be 21 inches, depth would be 5.