First find the operating cost for 1 acre. Find that by dividing $551,520 by 20 acres. That gives us $27,576 per acre. Now we can set up a proportion to solve for the number of acres that have an operating cost of $441,216:

$\frac{cost}{acre}:\frac{27,576}{1}=\frac{441,216}{x}$

Cross multiply to get:

27576x = 441216 so

x = 16

We did not have to find the cost per acre to solve this. We could have set up the proportion with $551,520 on the top of the ratio and 20 on the bottom and we would still have gotten the same answer. I just figured the numbers wouldn't be as large if we divided to find the cost per unit.

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3 years ago

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F(x) = -7x^2+8x+2 what is the value of the discriminant of f

Murrr4er [49]

Answer:

D = 120, there are 2 real roots for F(x)

Step-by-step explanatU

using the

formula D = b^2 - 4ac for discriminant

D = 8^2 - 4*(-7)*2

D = 64 + 56 = 120