Question

A sporting goods store is having a 15% off sale on all items. Which functions can be used to find the sale price of an item that has an original price of x? You may choose more than one correct answer.

ƒ(x) = x - .15x
Sale = Original - 15
ƒ(x) = 1.15x
Sale = Original - .15(Original)
y = .85x

Answer 1

what's 15% in decimal format?

Answer 2

.15

Answer 3

well... so if the item was on sale originally for "x"
the discounted amount is "x - 0.15 of x" what's that? well, x - 0.15x
which incidentally is also 0.85x

Answer 4

x - 0.15(of itself) will be 0.85
or in other way 1 - 0.15 = 0.85

Answer 5

thanks

Answer 6

yw