Question

Heather and William are at their local Pokemon specialty store which is running a 20% off sale when you purchase 5 packs of cards. They are both purchasing 5 packs, and each pack costs $4.25 (taxes included). (4 points) (7.EE.2)

(1 point)
A) What is the original price for 5 packs of cards? $
Question 2
Heather says she can find her cost by using the expression p - 0.2p where p is the original price for 5 packs of cards.
William says he can find his cost by using the expression (1 – 0.2)p.
(2 points)
B) Who is correct?

C) Which method would you choose?

Question 3
(1 point)
D) What is the discounted price? $
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Answer 1

A) $21.25 (5 × $4.25)

B) Both are correct. p − 0.2p = (1 − 0.2)p = 0.8p.

C) I’d use (1 − 0.2)p (i.e., 0.8p) because it’s shorter.

D) Discounted price = 0.8 × $21.25 = $17.00 (or $21.25 − $4.25 = $17.00).