Answer:
.0024776131
Step-by-step explanation:
type it into a TI-84 and remember than any negative exponent turns the number into a fraction
.0029 see picture below for step by step explanation.
12x - 6y + 9z - (-x - 3z + 6y) = 12x - 6y + 9z + x + 3z - 6y = 13x - 12y + 12z
32ft you do 8*2*2*1 to get 32