Question

Suppose you want to buy 100 pens. You can buy 100 pens at a 10% discount at one store where the price is $3.99 per pen. And you can also buy 100 pens at a 15% discount at another store where the price is $4.27 per pen. What is price per pen at the first and second store?

Answer 1

Extraneous information: 100 pens.

Store 1:
\[Price_{pen1} = $3.99 - $(3.99*.10) = $3.99*.90 = $3.591\]\[Price_{pen2} = $4.27 - $(4.27 * .15) = $4.27*.85 = $3.6295\]

Answer 2

thank you so much!!!

Answer 3

Yup :D