7 baseballs
Explanations:Cost of a bat = $26
Cost of each base ball = $7.50
Let the number of baseballs that can be bought be x
Cost of x baseballs = 7.50x
The amount of money that the coach has = $84
Since he cannot spend more than the amount of money that he has:
Cost of the bat + Cost of x baseballs ≤ Amount of money that he has
26 + 7.50x ≤ 84
7.50x ≤ 84 - 26
7.50x ≤ 58
x ≤ 58/7.50
x ≤ 7.7
This means that the greatest number of baseballs that the coach can purchase is 7
