Answer:
14
Step-by-step explanation:
Number of 12-packs = 14
Cost Number of 12-packs
3.50 1
49.00 x
Number of 12-packs for $49 = 14
f(9)=54
Subsitute 9 for x in f(x)=6x
1) D
2) B
3) no solution
y ≤ 0.5x - 4 is area C including the red line
y ≥ 0.5x + 5 is area A including the blue line