Respuesta :
Answer:
Change will be $13
Step-by-step explanation:
Serena bought two rolls of paper towels and two boxes of detergent.
First we have to get the amount of money that Serena bought.
two rolls of paper towels $1
two boxes of detergent $3 each , so $3 x 2 = $6
Total= $1+$6=$7
If She pays with $20 , change will be the difference between $20 and how much she spent.
Change = $20-$7=$13