Answer: $4.51
Step-by-step explanation:
If the order cost is $8.49, and she leaves a seven-dollar tip, then her total cost can be found by adding the original cost with the tip. [tex]8.49 + 7 = 15.49[/tex]. Using this value, we can subtract it from $20 to find how much change she should receive. Since [tex]20.00 - 15.49 = 4.51[/tex], Avery needs to receive $4.51 in change.
