Answer:
12.85g+ 4.79b
Explanation:
Given,
The cost of paint = $12.85 per gallon,
Number of gallon of paint = g,
So, the total cost of the paint = 12.85g dollars,
Also, the cost of brush = $ 4.79 per gallon,
Number of brushes = b,
So, the total cost of the brushes = 4.79b dollars,
Thus, the total cost = total cost of the paint + total cost of brushes
= 12.85g + 4.79b
Which is the required expression.