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Pepsi [2]
3 years ago
12

the amount of water in a bathtube as it drains can be modeled by this equation with y representing the number of gallons of wate

r in the tub and x representing the time, in minutes, that the tube has been draining y=-7.3x+39.7 after how many minutes will the tub have 17.8 gallons of water remaining

Mathematics
1 answer:
koban [17]3 years ago
4 0
Since y is representing the number of gallons of water in the tub, we need to replace y with the number of gallons remaining in the tube to find the time. Fortunately, the problem is telling us  just that: 17.8 gallons. The only thing left is replacing that value in the equation, and solve for x to find the time:
17.8=-7.3x+39.7
7.3x=21.9
x= \frac{21.9}{7.3}
x=3

We can conclude that after 3 minutes <span>the tub will have 17.8 gallons of water remaining.</span>
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