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?

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?

oobleck · Accepted Answer

hard to say. does he go for the auto renewal? does he sign up in July?

jake heys · Answer

he signs up in july

oobleck · Answer

so his cost will be 84 * 0.80 - 5(n/2) if he refers n people. So now we have 84 * 0.80 - 5(n/2) < 48 n > 7.68 so he referred at least 8 people