Question

A total of $24,000 is invested in 3 accounts earning 5%, 7%, and 9% anual interest. The combind interest for one year is $1794. If the amount invested at 9% is four times the amount at 7%, find the amount invested at 5%.

Answer 1

Let x = amount invested at 7%
Then 4x = amount invested at 9%
24000-5x=amount invested at 5%

Answer 2

Can you get it from there?

Answer 3

how would I write that in an equation?

Answer 4

.07x= interest on the 7% investment
.09(4x)= .36x=interest on 9% investment
.05(24000-5x)= interest on 5% investment

Answer 5

Write the equation that says the total interest is $1794

Answer 6

how do I that?

Answer 7

Do you know how to find a total?

Answer 8

no I'm lost

Answer 9

You go to the store and buy a CD for 10 dollars and toothpaste for 5 dollars. What is your total bill?

Answer 10

oh $15 lol

Answer 11

So how do you find the total?

Answer 12

you add them

Answer 13

So if you know the total interest is 1794 would it make sense to add the 3 interest amounts and set it equal to 1794?

Answer 14

ohh yeahh!

Answer 15

$1382 at 5%

Answer 16

Not what I got.