40-30=10 minutes more per day x 31 days = 310minutes in a month with 31 days.
2 shoes in each box * 19 shoe boxes = 38 shoes
38 shoes * 9 shipping boxes would be 342 shoes in all
A good estimate would be around 342. Hope that helps
To make it much easier, it should be converted to the slope-intercept form
y = mx + bTo do so, 14x + 34y = 1 turns to:
34y = -14x + 1Divide both sides by 34:

Simplified:
Answer: 
Here is the graph: