Brad puts an equal amount of money in his savings account once a month. He started with $27. The next month, he had $44 in his account. Two months after that, he had $78 in his account. How much money will Brad have in his account after 6 months?

Respuesta :

Answer:

$112

Step-by-step explanation:

Brad puts an equal amount of money in his savings account once a month. He started with $27.

The next month, he had $44 in his account. The difference between these amounts are $17.

Two months after that, he had $78 in his account. The difference between these amounts are $34.

This can be observed that, each month the amount gets increases by a multiple of 17. So the function that can represent this scenario is,

[tex]f(n+1)=27+17n[/tex]

where,

[tex]f(n+1)[/tex] is the amount of money in the account and n is the month.

Putting [tex]n=5[/tex], we get

[tex]\Rightarrow f(5+1)=27+17(5)[/tex]

[tex]\Rightarrow f(6)=27+85=\$112[/tex]