the answer would be C!
Step-by-step explanation:
to get the total of the bill with tax you would do 13.75 time 5, since 5 people each spent $13.75.
13.75x5=68.75
now we have to find out how much the bill was BEFORE tax. to do this we divide 68.75 by 1.07, since the tax is 7%. when we do 68.75 divided by 1.07 we get 64.25!