Answer:
Micah spends $42.21 on paintbrushes.
Paint costs $21.64 per gallon.
Step-by-step explanation:
The paintbrushes are constant/fixed price, the number of gallons of paint are variable, the costs rises linearly with each gallon.
150 - 42.21 = 107.79
The fixed costs for paintbrushes are subtracted from his budget. He then has $107.79 left for paint
107.79 / 21.64 = 4.98105360444
Wich is, it's a pity, slightly less then 5 gallons.
he could buz 4.98 gallons. or, if it has to be a whole number, which I guess it has to be, just 4 gallons and has some money left.
