Answer:
The correct option is:
100 + 0.8(x - 100) = 250
Step-by-step explanation:
We are given that:
We know that a department store gives 20 % off the portion of the bill that is over 100 dollars.
Total bill is 250 and x is the amount of money she would have spent without the promotion.
The cost to which the discount applies is 0.8 ( x - 100 ).
Finally the equation we get is 100 + 0.8 (x - 100) = 250.
Answer:
100+0.8(x−100)=250
Step-by-step explanation:
Since x represents the amount of money Ruby would have spent on the same purchase at the department store without the promotion, and since she only receives a discount on any portion of her bill over $100, we have that x - 100 represents the cost of the purchase to which the discount applies.
Also, since the promotion gives a 20%discount to this portion, a consumer will pay 80% of the original price for this discounted merchandise. Therefore, we have that 0.8(x−100) is the price she pays for the discounted merchandise.
Adding the pre-sale $100 to the discounted purchase price gives the money that Ruby spent on the entire purchase, or $250. This results in the following equation:
100+0.8(x−100)=250
hope it helps :)
mark brainliest!
