Answer:
1) 3
2) 3.5
3) 9
4) 12
Step-by-step explanation:
.5*6=3
.5*7=3.5
.75*12=9
.4*30=12
3
3.5
9
7.5
1/2*6=3
1/2*7=3.5
3/4*12=9
2/5*30=7.5
company b 10,080 dollars
(2x+3y-4z)*(2x+3y-4z) or (2x+3y-4z)^2