kalesha is purchasing a laptop. the original price of the laptop is $900. the store is offering 10% off on…

kalesha is purchasing a laptop. the original price of the laptop is $900. the store is offering 10% off on all computers. kalesha has a $100 gift card. how should kalesha determine the amount she will pay for her computer? subtract $100, then take 10% off. take 10% off, then subtract $100. done

kalesha is purchasing a laptop. the original price of the laptop is $900. the store is offering 10% off on all computers. kalesha has a $100 gift card. how should kalesha determine the amount she will pay for her computer? subtract $100, then take 10% off. take 10% off, then subtract $100. done

Answer

Explanation:

Step1: Calculate price after discount

First, find the price after the 10% - off discount. The price after the 10% - off discount of an original price $P = 900$ is $P_1=(1 - 0.10)\times900=0.9\times900 = 810$. Then, subtract the value of the gift - card. If we first take 10% off and then subtract the $100$ gift - card, the final price is $810-100 = 710$. If we subtract the $100$ gift - card first, the price becomes $900 - 100=800$, and then taking 10% off gives $0.9\times800 = 720$.

Step2: Compare the two methods

We want to pay the least amount. Since $710<720$, we should take 10% off first and then subtract the $100$ gift - card.

Answer:

Take 10% off, then subtract $100$.