Answer:
The third one
Step-by-step explanation:
You would do 20 • 3=60 and the you would add 20 • 1/5=4 so, your total is 64in.
Answer:
A. Kim's son
B. 9/28
Step-by-step explanation:
Give the fractions a common denominator of 28 then add.
12/28>7/28, so the son mowed more. 7/28+12/28=19/28. subtract this from 1 whole lawn and get 9/28.
Answer:
3=b
Step-by-step explanation:

The roller coaster will need to run 4 times.
Explanation:
If there are 15 adults and 9 children, then we know that they're 24 people in total on the line (15 + 9 = 24). Now, we divide 24 by 6, because there are 24 people and a roller coaster holds up to 6 people. 24/6 = 4, therefore the roller coaster will need to run 4 times.