Can somebody please help?

I believe these are correct

Step-by-step explanation:

1) y-intercept = 1 and slope = 3

2) rate of change is -2/5

3) initial value is 18

4) the barrel will be empty at 45 minutes because every 5 minutes the water decreases by 2 gallons

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10