Answer:
<h2>5 + 3w + 3 - w = 2w + 8</h2>
Step-by-step explanation:

The domain is the input values, which would also be X values.
{ x |x= -5, -3, 1, 2,6}
Since its telling you that x is the number of years and the question is "How much does the cost of milk increase EVERY YEAR" then you can conclude that the cost is increasing by 0.25 each year
25*2=50
10*5=50
so 2 packets of envelopes and 5 packets of stamps