Residents of the town of Maple Grove who are connected to the municipal water supply are billed a fixed amount monthly plus a charge for each cubic foot of water used. A household using 1100 cubic feet was billed $114, while one using 1500 cubic feet was billed $130.
What is the exact charge per cubic foot?

The exact charge per cubic foot of water usage is 4 Cents.

Step-by-step explanation:

Let the per cubic foot charge be $ 'x' and the fixed charge be $ 'y'.

A household using 1100 cubic feet was billed $ 114.

Therefore, we get the equation,

.......( A )

And other household 1500 cubic feet was billed $ 130.

Therefore, we get the equation,

......( B ).

Now, we subtract equation A from  equation B.

.....( B )

......( A )

__________________

So, we get,

.

Therefore,

Cents.

So, the exact charge per cubic foot is 4 Cents.

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black/brown

step-by-step explanation:

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