Question

I need to find and write the equation for the problem.

Layla wants to but a smart phone online using a $50 discount coupon along with a 20% discount on the original cost of the phone. Layla can spend up to $150. Write an inequality to find the original price of the smart phone she can afford.

(p = phone) variable


I think it may be:
(p-20%)-50 is less than or equal to 150

Thank you

Answer 1

Right.

The only correction is that the percentage should be changed to a decimal.

(p - 0.2) - 50 <= 150

Answer 2

small correction:

the in-equation should be

(p - .2p) - 50 ≤ 150
or
.8p - 50 ≤ 150

check:
.8p ≤ 200
p ≤ 200/.8 or p ≤ 250
phone could cost $250
less 20% or less $50 means cost could cost $200
and she has a $50 coupon, so her $150 will do.

Answer 3

Thanks, Reiny!

Answer 4

I don't get it!!!