Question

You have a coupon worth $18 off the purchase of a scientific calculator. At the same time the calculator is offered with a discount of 15%, but no further discounts may be applied.The equation, p-18=0.85p, is the correct answer. Where did the 0.85 come from?​

Answer 1

The 0.85 in the equation represents the remaining 85% of the original price after a 15% discount. It is used to calculate the discounted price before applying the $18 coupon on the scientific calculator.

Step-by-step explanation:

The equation p - 18 = 0.85p represents the final price (p) of a scientific calculator after applying a coupon and a discount. The number 0.85 comes from subtracting the percentage discount from 100%. In this case, a 15% discount on the calculator is offered, so we calculate the remaining percentage that represents the price after the discount by subtracting 15% from 100%, which gives us 85% or 0.85 as a decimal. This decimal is then multiplied by the original price (p) to find the discounted price before applying the $18 coupon.