Yes, you can add a negative and a positive when doing like terms.
Answer:
its the first one
Step-by-step explanation:
40×4×4=640
b=20 h=4
using formula:
1/2×base×height
1/2×20×4=40
its says scale by factor 4:
b=80 h=16
using formula:
1/2×base×height
1/2×80×16=640
answer------>>>>640cm^2
If it’s 5 points no one is gonna answer
3 sig figs in the final answer since the denominator has 3 sig figs. So the answer would be 4.05