Question

Standardized Test Prep: A music store sells CDs for $12 each. Customers may use one coupon good for $4 off the total purchase. Suppose a customer buys n number of CDs using a coupon. Which equation models the relationship between the total cost t and the number of CDs a customer buys?

A. t = 12n – 4


B. t = 4n – 12


C.4t = 12n


D. t = 12 - 4n


E. t = 4- 12n

Answer 1

a

Answer 2

just think of it this way if you buy n cds for 12 dollars cost = 12*n
using a $4 coupon reduces price by 4 therefore:
12n-4=t

Answer 3

thxs