An executive invests $21,000, some at 8% and the rest at 5% annual interest. If he receives an annual return of $1,590, how much is invested at each rate?

Amount invested at 8% is 1800 , and Amount invested in 5% is .

Step-by-step explanation:

Here we have , An executive invests $21,000, some at 8% and the rest at 5% annual interest. If he receives an annual return of $1,590, We need to find how much is invested at each rate . Let's find out:

Let x be amount invested in 8%  , So amount invested in 5% will be

$(21,000-x) . According to question , If he receives an annual return of $1,590

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Therefore , Amount invested at 8% is 1800 , and Amount invested in 5% is .