Answer: D
Step-by-step explanation:
D
Work Shown:
(90 lawns)/(45 hours) = (12 lawns)/(x hours)
90/45 = 12/x
2 = 12/x
2x = 12
x = 12/2
x = 6
It takes 6 hours to mow 12 lawns.
Answer:
= 34/5 × 19/4
= 646/20
=
