Start by writing an expression for each case. Then add them.
A=6240-0.02x
Practice makes perfect
We will start by writing an expression for the amount of money after one year in the savings account that pays 2 % interest per year. Carrie puts x dollars into that account.
x* (1+ 0.02)^1 ⇒ x* (1.02)
The rest of the money (6000-x) is used to buy a certificate of deposit that earns 4 % interest.
(6000-x)* (1+0.04)^1
⇕
(6000-x)* (1.04)
The sum of the expressions will give the amount of money that Carrie will have in one year.
