Calvin wants to buy a car alarm

Asked by maham237 @ in Mathematics viewed by 380 People

Calvin wants to buy a car alarm that has a full price of $325, plus a 12% sales tax. Which is the better offer, a 35%-off sale or a $100 coupon?
A. The 35%-off sale is better, because Calvin will pay a total of $236.60.
B. The $100 coupon is better, because Calvin will pay a total of $264.
C. The $100 coupon is better, because Calvin will pay a total of $225.
D. The 35%-off sale is better, because Calvin will pay a total of $211.25.

Answered by maham237 @


First calculate the total price of the car alarm
P = 325 + 0.12(325)
P = $ 364 is the total prize of the car alarm

then calculate the discounted price
35%-off sale
P = 364( 1 - 0.35)
P = 364(0.65)
P = $ 236.6

$ 100 coupon
P = 364 - 100
P = $ 264
so it is better to have the 35%-off sale
so the answer is A

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