Answer: [tex]\$12.50[/tex]
Step-by-step explanation:
You need to analize the information provided in the exercise.
You know that the price of a medium soda was:
[tex]Medium\ soda=\$1.25[/tex]
And the price of a hot dog was:
[tex]Hot\ dog=\$2.50[/tex]
Therefore the total amount of money Jack spent in 2 medium sodas and 2 hot dogs, was:
[tex]Total=2(\$1.25)+2(\$2.50)\\\\Total=\$7.50[/tex]
Since Jack paid with $20, you need to subtract the total amount of money calculated before from $20, in order to calculate his change.
Therefore, you get that Jack's change was:
[tex]Change=\$20-\$7.50\\\\Change=\$12.50[/tex]