Q:

Chem deposited $115.00 in a savings account. Each week thereafter, hedeposits $35.00 into the account.a. Write a function to represent the total amount Chem has deposited for any particularnumber of weeks after his initial deposit.b. How much has Chem deposited 30 weeks after his initial deposit?

Accepted Solution

A:
Answer:Part a) [tex]y=35x+115[/tex]Part b) [tex]\$1,165[/tex]Step-by-step explanation:Part a) Letx -----> the number of weeksy ----> the total amount Chem has deposited in a saving accountwe know thatThe equation of a line in slope intercept form is[tex]y=mx+b[/tex]wherem is the rate or slope of the linear equationb is the y-intercept of the linear equation or initial value (value of y when the value of x is equal to zero)In this problem we have thatThe rate or slope is equal to[tex]m=35\frac{\$}{week}[/tex] -----> amount deposited by Chem each weekThe y-intercept or initial value is[tex]b=\$115[/tex] ----> amount deposited originally in the saving accountsubstitute the values[tex]y=35x+115[/tex]Part b) How much has Chem deposited 30 weeks after his initial deposit?For x=30 weekssubstitute in the equation[tex]y=35(30)+115[/tex][tex]y=\$1,165[/tex]