Question 292586
Henry sold 120 magazine subscriptions in x days.


a) Write a rational expression for the rate at which he sold the subscriptions.


He sold 120/x magazines per day.


b) Suppose that he continues to sell at the same rate for 5 more days. 


Write a rational expression for the number of magazines sold in those 5 days.


This would be 5 * (120/x).


Example:


Suppose x was equal to 10.


This means he sold 120/10 = 12 magazines per day.


If he continues to sell at the same rate, in 5 more days he will have sold 5 * 12 = 60 more magazines.


This means that in 10 days he sold 120, and in 15 days he sold 180.


120/10 = 12 magazines per day.


180/15 = 12 magazines per day.


The rate is the same as it should be.