3 years ago

Explanation and show work please.

Mathematics

1 answer:

VARVARA [1.3K]3 years ago

4 0

Answer would be A) -410 feet because you just add or subtract when needed that easy hope it helps! :p

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Here the given expression , where: n = Number of key rings in thousands is given as:

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Now, solving the above expression for the value of n, we get:

$n^2 - 2 n - 3 = 5\\\implies n^2 -2n - 8 = 0\\\implies n^2 -4n + 2n - 8 = 0\\\implies n(n-4) + 2(n-4) = 0\\\implies (n-4) (n+2) = 0$

So, n = 4, OR , n = -2

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