Answer:
407mm²
Step-by-step explanation:
the triangle face is 1/2(11)(13) = 71.5
there are 4 triangle faces so 71.5 x 4 = 286
plus the bottom, 11 * 11 = 121
286+121=407mm²
1/4 mile per minute is the average speed.
I'll take a look at it.
3x - 24 = 81
Add 24 to each side.
3x - 24 + 24 = 81 + 24
3x = 105
Divide each side by 3.
(3x)/3 = 105/3
x = 35
Answer: x = 35
