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twhalon72
17.09.2019 •
Mathematics
$22,102 is invested, part at 11% and the rest at 7%. if the interest earned from the amount invested at 11% exceeds the interest earned from the amount invested at 7% by $913.46, how much is invested at each rate? (round to two decimal places if necessary.)
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Ответ:
.11x = .07y + 913.46 = x= (7/11)y + 8304.18
((7/11)y + 8304.18) + y = 22,102
(18/11)y = 13797.82
y= 13797.82/(18/11)
y=8432.00
8,432.00 dollars are invested at 7%
13,670.00 dollars are invested at 11%
Check
.07 x 8432= 590.24
.11 x 13,670 = 1503.70
1503.70 - 590.24 = 913.46
Ответ:
x≥0
Step-by-step explanation:
The domain of the function f (x) is all the values of x for which the function is defined. In a graph, this can be seen as all the values that the function takes with respect to the x-axis. This function graph only has positive values and the zero, this means x takes zero and the values bigger than zero. So x≥0.