50 points, asap

which of the following systems of inequalities has point b as a solution? explain why.

a) f(x) ≤ 3x + 4
g(x) ≤ -1/2x - 5

b) f(x) ≥ 3x + 4
g(x) ≤ -1/2x - 5

c) f(x) ≤ 3x + 4
g(x) ≥ -1/2x - 5

d) f(x) ≥ 3x + 4
g(x) ≥ -1/2x - 5

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.

Hey, can you post the problem?