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pentagon [3]
2 years ago
9

Jada walks up to a tank of water that can hold up to 10 gallons. When it is active, a drain empties water from the tank at a con

stant rate. When Jada first sees the tank, it contains 7 gallons of water. Three minutes later, the tank contains 5 gallons of water.
c) how many minutes before jada arrived was the water tank completely full?​
Mathematics
1 answer:
Arte-miy333 [17]2 years ago
6 0

Answer:

  • 4.5 minutes

Step-by-step explanation:

At time zero the level was 7 gallons and at time 3 min, the level was 5 gallons.

<u>Take two points:</u>

  • (0, 7) and (3, 5)

<u>Find the rate of change:</u>

  • m = (5 - 7)/3 = 2/3

This is a 2 gallons per 3 minutes

<u>Tank holds 10 gallons, it was emptied by 3 gallons and it took:</u>

  • 3 : (2/3) = 3* 3/2 = 4.5 minutes
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