chevysilverado3464
17.01.2021 •
Mathematics
What is the explicit rule for the arithmetic
sequence?
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Ответ:
The amount invested at 7% is $1,400 and the amount invested at 9% is $7,600
Step-by-step explanation:
Let
x ----> amount invested at 7%
(9,000-x) -----> amount invested at 9%
we know that
The interest earned by the amount invested at 7% plus the interest earned by the amount invested at 9% must be equal to $782
so
The linear equation that represent this problem is
solve for x
therefore
The amount invested at 7% is $1,400 and the amount invested at 9% is $7,600