Shana bought 6.2 pounds of pecans and paid $56.00. About how much per pound did the pecans cost?
2 answers:
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a = amount invested at 7%
b = amount invested at 9%
we know the amount invested was ₹36000, thus we know that whatever "a" and "b" are, a + b = 36000. We can also say that
since we know the interest earned from the invested was ₹2920, then we say that 0.07a + 0.09b = 2920.