25. 29 minutes and 53 seconds
26. 6 gallons
1. 7 : 07
2. 9 : 45
3. 6
4. 2 : 25
5. 8
6. 17
So the answers are :
A: 5 seconds
and
B: 10 seconds
140 if I observed the image correctly.
Ur output value is f(x).....so to do this problem u need to sub in 2/3 for f(x) and solve for the input value which is x
f(x) = -1/3x + 7
2/3 = -1/3x + 7 ...multiply everything by 3
2 = -x + 21
2 - 21 = - x
- 19 = -x
19 = x <== ur output
