Answer:
-20d^3 + 55d + 35.
Step-by-step explanation:
-4d(5d^2 - 12) + 7(d + 5)
= -20d^3 + 48d + 7d + 35
= -20d^3 + 55d + 35.
Answer: A- she can not mow 1 and 1/4 in an hour.
Step-by-step explanation:
set up a ratio
(1/2 acre is 25 minutes, x acre in 60 minutes)
cross multiply to solve
.5(60)=25x
30=25x
1.2=x- she can mow 1.2 acres in 60 minutes, 1.2= 
Answer:
50.24sq units
Step-by-step explanation:
4^2=4x4
4x4=16
16x3.14=50.24
If x were 40, then Y would be
A) 20