if 81000 is invested at 5% annual simple interest how much should be invested at 9% annual simple interest so that the total yearly income from both investment is $621

this is not the answer for that but this is how you will do it

If $7500 is invested at 6% annual simple interest, how much should be invested at 9% annual simple interest so that the total yearly income from both investments is $882.

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let x=$ invested at 9%

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6%*7500+9%x=882

450+.09x=882

.09x=882-450=432

x=432/.09=4800

Ans:

$4800 should be invested at 9%

Step-by-step explanation:

answer: i believe the answer is e

step-by-step explanation: