Question

The expression 0.9(P−15)+0.05P0.9(P−15)+0.05P represents the final price of a chair after two discounts were taken and a delivery fee. The delivery fee is added to the discounted price after the first two discounts. The variable P represents the price of the chair before discounts and fees are applied.

Which statements are true?

Select each correct answer.

The price of the chair was first reduced by $15. <====== this is my answer

The price of the chair was first reduced by 10%. <====== and this is my answer

The delivery fee was 15% of the original price.

The delivery fee was 5% of the original price.

Please check them :)

Answer 1

0.9(P - 15) + 0.05P[0.9(P - 15)] + 0.05P
0.9(P - 15)(1 + 0.05P) + 0.05P
From this, we can see that there is a 10% discount indicated by multiplication by 0.9 and a flat discount of $15 from (P - 15)
However, the last term indicates that the delivery cost is 5% that of the original price.