You need to distribute the 3, so your answer would be 6b-3
Determine the additional cost of housing for a month.

Determine the additional cost of housing for a year.

The moving charge is 545
$114.76 since he only used 24 cents. It's basic subtracting so it should be easy
When going from the bottom corners, the one going from left to right has a positive slope of 1/2, and the side going from right to left has a negative slope of 1/2. That is the slope of the side of the triangle and that slope makes the most sense in this situation.