PLease help, I cannot figure out the formula to use. An investor invested a total of $900 in two mutual funds. One fund earned 9% profit, and the other fund earned %5 profit. If the investor earned a total of $65, how much was in each fund?

Question

PLease help, I cannot figure out the formula to use.  An investor invested a total of $900 in two mutual funds. One fund earned 9% profit, and the other fund earned %5 profit. If the investor earned a total of $65, how much was in each fund?

jdoe0001 · Answer

so he invested in 2 mutual funds
let's call them "a" and "b"

how much was the total amount he invested in both?

how much money did he make in both total?

anonymous · Answer

would it be a+b=65 and 9a+5b=900

jdoe0001 · Answer

close, 
a + b = 900
0.09a + 0.05b = 65

jdoe0001 · Answer

9% = 9/100
n% = n/100

jdoe0001 · Answer

you can multiply the 2nd equation by 100 to make it
9a + 5b = 6500

anonymous · Answer

I got them backwards and forgot to put the percents in correctly, thank you so very much :)

jdoe0001 · Answer

yw

anonymous · Answer

going to solve will you double check it for me when I am done?

anonymous · Answer

I am doing something wrong, not sure if it's because I have been doing math so long or what. Math makes me so nervous.

anonymous · Answer

I still need help with this :(

anonymous · Answer

Would it be the %9 fund had $45, and the %5 fund had 20??????