Answer:
function to express the number of books, b, that Merv has over m months:
b = 15 + 2m
books he will have after 3 months = 21 books
Explanation:
books in the bookshelf = 15
each month he buys = 2 books
function to express the number of books, b, that Merv has over m months:
b = 15 + 2m
books he will have after 3 months:
b = 15 + 2(3)
= 15 + 6 = 21 books