Answer:
$5
Explanation:
First, find how much one slice of pizza costs.
Divide Mario's total by the number of slices he got:
3.75/3
= 1.25
So, one slice of pizza costs $1.25
Add this to his total to find how much his bill will be with one more slice:
3.75 + 1.25
= 5
So, his bill will be $5