### Home > CCA2 > Chapter 10 > Lesson 10.1.1 > Problem10-7

10-7.

Uncle Zachary decided to increase the amount he was saving for Angela by $\5$ each month instead of three.

1. How much would he deposit on the month of her second birthday?

Recall that Uncle Zachary puts $\50$ in Angela's account the first month.
In this case he will put $\55$ in Angela's account the second month and $\60$ the third month.

The sequence is $50$, $55$, $60$, $65$, ..., which is linear. The equation should be of the form $an+b$.

2. Write a formula for the $n$th term of this sequence.

$t(n)=50+5(n-1)$ or $t(n)=5n+45$

3. How much money is in the account the month of her first birthday, just after he made his $12$th deposit?

Add the first $12$ terms of your sequence.