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Nitella [24]
3 years ago
10

Pablo was reviewing the water bill for his carwash business and determined that the highest​ bill, $5,000, occurred in july when

​ 4,000 cars were washed and the lowest​ bill, $4,000, occurred in february when​ 2,000 cars were washed. what was the fixed portion of the water​ bill?
Business
1 answer:
4vir4ik [10]3 years ago
8 0

The easiest way to solve this is to work with two equations:

<span>X + 4000Y = $5000  (1)</span>

<span>X + 2000Y = $4000  (2)</span>

Where X is the fixed portion of the water bill and Y is the cost of water per car.

 

Solve for X for each equation:

<span>X = $5000 – 4000Y  (3)</span>

<span>X = $4000 – 2000Y  (4)</span>

 

Therefore:

$5000 – 4000Y = $4000 – 2000Y (5)

 

Solve for Y:

Y = $0.5

 

Substitute into equation1:

X + 4000(0.5) = $5000

<span>X = $3000</span>

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