SOLUTION: You have a coupon good for $7 also the price of any large pizza. You also get a 20% discount on any pizza if you show your student ID. How much more would you pay for a large pizza

Question 853192: You have a coupon good for $7 also the price of any large pizza. You also get a 20% discount on any pizza if you show your student ID. How much more would you pay for a large pizza if the cashier applies the coupon first?
Answers:
a. $1.70 c. $1.40
b. $0.00 d. $0.70

Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
If you use the coupon first,
(P-7)*.80 (the reciprocal of .20)
If you use the discount first,
.8P - 7
.
Let's assume the pizza is $20.
Coupon first: (20-7)*.8 = $10.40
Discount first: (.8*20)-7 = $9.00
.
You'll pay $1.40 more by using the coupon first.
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