SOLUTION: Please help me in my homework. I think this is invalid yet our teacher gave it to us. Grace invested $200000 for one year. Some invested at 10% rate and the remaining at 12% rat

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Question 940581: Please help me in my homework. I think this is invalid yet our teacher gave it to us.
Grace invested $200000 for one year. Some invested at 10% rate and the remaining at 12% rate. If the accounts earned $4500, how much was invested at each rate?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39630)   (Show Source): You can put this solution on YOUR website!
The description runs like a two part mixture problem but is an investment problem instead.

u = how much at 10%
v = how much at 12%




Two linear equations in two unknown variables, u and v.
Answer by MathTherapy(10557)   (Show Source): You can put this solution on YOUR website!

Please help me in my homework. I think this is invalid yet our teacher gave it to us.
Grace invested $200000 for one year. Some invested at 10% rate and the remaining at 12% rate. If the accounts earned $4500, how much was invested at each rate?
This is IMPOSSIBLE!!

At those rates, and a principal of $200,000, earnings should be a lot more than $4,500 for the year. Are you certain 

you have the right numbers &/or info.? 

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