Answer:
idk srry
Step-by-step explanation:
A)7
B)14
C)20
D)18
For example 2/5 of 80
2/5 x 80/1 =32 Cross cancel
mean = sum/n
mean = (5 + 7 + 7 + 9 + 12 + 16 + 21)/7
mean = 77/7
mean = 11
33.2
28,561
80 mph
720÷9=80
hope this helps!!!