Answer:
The person invested $3500 at 7% and $2500 at 5%
Step-by-step explanation:
We can say that because the investment is equal both in one as in another, where x is the income from the investment.
Solving the equation we have:
Then to get the incomes:
At 7%:
And at 5%:
Finally we can demonstrate the answer because the income at 7% + income at 5% are 3500+2500=$6000
I think the answer would have to be C if I am right
Divide both side by and rearrange terms to get a linear ODE;
Multiply both sides by :
The left side can be condensed as the derivative of a product:
Integrate both sides, then solve for :