Elizabeth mowed 12 lawns in 4 hours. What was her rate of mowing in lawns per hour?

3 lawns per hour

Step-by-step explanation:

12 ÷ 4 = 3

4+n=5

step-by-step explanation:

this is because the four is four hours and the n represents the 1 extra hour over the weekend.

b= i'm srry i don't know that one.

4+n=5 n=1 because if vernon plays 5 hours a week then 4+1=5 hours.

hope this : )