Matthew would like to join an online book club that costs $84 per year. If he signs up for an automatic renewal, he will get 5% off his membership. If he signs up in July, he can get an additional 20% off. In addition, for every 2 people he refers to the club, he can get $5 off his membership. How many people does Matthew refer if he pays less than $48 for his membership? Explain.

Question

Matthew would like to join an online book club that costs $84 per year. If he signs up for an automatic  renewal, he will get 5% off his membership. If he signs up in July, he can get an additional 20% off. In addition, for every 2 people he refers to the club, he can get $5 off his membership. How many people does Matthew refer if he pays less than $48 for his membership? Explain.

Steve · Answer

5% of $84 = $4.20 20% of $84 = $16.80 Assuming no discounts, he needs n referrals, so that 84 - 5n < 48 Adjust that 84 according to how many discounts he achieved.