Answer:
21
Step-by-step explanation:
I dunno, I used a calculator B)
Answer:
12m-18-3m=2m+m-18
9m-18= 3m-18
9m-3m=18-18
6m=0
m=0/6=0
Step-by-step explanation:
Answer:
60x
Step-by-step explanation:
Answer x= 18 y=-39
Step-by-step explanation:
Answer:
546
Step-by-step explanation:
Surface Area = 2(lw + lh + wh)
plug in 21 10.5 and 2.5