Math
posted by HI on .
Winnie can use up to 10 coupons when buying a box of DVDs. Each coupon is worth $3. She bought a box of DVDs for $56 less the value of her coupons.
a)choose a variable to represent the number of coupons.
b)Write an Algebraic expression that describes the amount Winnie paid for the box of DVDs.
c)use your expression to calculate how much Winnie would pay if she had 5 coupons.

a)choose a variable to represent the number of coupons.
Let's choose N
b)Write an Algebraic expression that describes the amount Winnie paid for the box of DVDs.
Let C be the amount paid.
C = 56  3N
c)use your expression to calculate how much Winnie would pay if she had 5 coupons.
For N = 5,
C = 56  15 = 41