CPM Homework Help : INT1 Problem 5-80

Lona received a stamp collection from her grandmother. The collection is in a leather book and currently has $120$ stamps. Lona joined a stamp club, which sends her $12$ new stamps each month. The stamp book holds a maximum of $500$ stamps.

Month	Stamps
$0$	$120$
$1$	$132$
$2$
$3$
$4$
$5$

Complete the table above.
Hint (a):
Continue adding $12$ to find months $2-5$ .
How many stamps will Lona have one year from now?
Hint (b):
Continue the table to month $12$ .
Write an equation using function notation to represent the total number of stamps that Lona has in her collection after $n$ months. Let the total be represented by $t(n)$ .
Hint (c):
Remember that the initial amount was $120$ stamps and the rate is $12$ stamps per month.
Answer (c):
$t(n)=120+12n$
Solve your equation from part (c) for $n$ when $t(n)=500$ . Will Lona be able to fill her book exactly with no stamps remaining? How do you know? When will the book be filled?
Hint (d):
Substitute $500$ for $t(n)$ .
$500=120+12n$