# Math Help - How Much Was Invested

1. ## How Much Was Invested

A college graduate made $28,000 in her first year working. She invested half the money in two CDs that earned 3% and 5% annual interest. After one year she earned$625 in interest. How much was invested in the 3% account?

2. let x and y be the amount she invested in the 3% and 5% account respectively.

We know that $x+y=\frac{28000}{2}=14000$ ___(1)
and $\frac{3}{100}x+\frac{5}{100}y=625$___(2)

You should be able to continue.
Cheers

P.S. please show your work and where you're stuck next time

3. Is this a system of equations in two variables?

4. yes, x and y. x is the amount invested in the 3% interest account, and y is the amount invested in the 5% interest account

5. Originally Posted by arze
let x and y be the amount she invested in the 3% and 5% account respectively.

We know that $x+y=\frac{28000}{2}=14000$ ___(1)
and $\frac{3}{100}x+\frac{5}{100}y=625$___(2)

You should be able to continue.
Cheers

P.S. please show your work and where you're stuck next time
In place of the fractions for equation 2, can I use 0.03 for 3/100 and 0.05 for 5/100?

6. of course, since they mean the same thing

7. I can take it from here.