Question

1. A tank has 25 gallons of chemicals in it. Chemicals were added to the tank at a rate of 7

gallons per second. Which equation models the relationship between t the number of
gallons of chemicals, and w, the number of seconds chemicals are being added to the
tank?
A T = 25w +7
B. T= 32W
C. T=W + 32
D. T = 7w + 25

Answer 1

D. T = 7w + 25

Explanation:

There is already 25 gallons of chemicals in the tank. Any further chemicals being put in would add on to that 25 gallons. If 7 gallons per second are going into the tank then the expression would be T = 7w + 25