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10 June, 12:40

Candy is on sale for $0.75 each. you have a coupon for $0.25 off your total purchase. Write a function rule for the cost of n pieces of candy.

A. C (n) 0.25n-0.75

B. C (n) = 0.75n-0.25

C. C (n) = 1.0n

D. C (n) = 0.75n

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  1. 10 June, 12:54
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    The answer is B. C (n) = 0.75n - 0.25.

    Let n be the number of pieces. The price for 1 piece is $0.75. The price C for n pieces without a coupon is n * $0.75: C (n) = 0.75n. The coupon value is $0.25. So, this value must be subtracted from the total price of n pieces. Since the coupon values in independent on the number of pieces, the price C for n pieces with the coupon will be: C (n) = 0.75n - 0.25. Therefore, the correct choice is B.
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