Ok so to start you can go ahead and multiple $4.50 by 6 because she is buying 6 books.
4.5*6 = 27
So subtract 27 from 39
39-27=12
Divide 12 by .25
12/.25 = 48
Now divide 48 pieces amount her 6 friends
48/6 =8
8 pieces for each of her friends
First we can subtract the sales tax so we are just working with what's left: $17 - $0.92 = $16.08. Then we multiply the price of the sandwiches by 2 for the number Corey bought: 5.25 x 2 = $10.50. Then subtract that amount from what you have left: $16.08 - 10.50 = 5.58. Then, take that amount and divide it by three drinks: $5.58 / 3(drinks) = $1.86 per drink. I don't see the table so I hope this answers the question well enough!:)
