Answer:
x = 9
Step-by-step explanation:
1/4(8x+12) =21
1/4 * 8x = 2x
1/4 * 12 = 3
2x + 3 = 21
21 - 3 = 18
2x = 18
18/2 = 9
27.60
it is 7, 14+21 =35, 35/5= 7
30ft³
The bottom part is 14 (2 x 7 x 1) and both top parts are 8 (2 x 4 x 1) so 14 + 8 + 8 is 30. Its in feet so feet cubed is your units.
