Answer:

Step-by-step explanation:
Cost of one dress = 
Cost of one pair of shoes = 
Cost of one dress and a pair of shoes is 
They get half off the price because they buy both

The shipping and handling charge is
.
So, the total amount Ruth has to pay is
.
Well, let's say we start with 10 granola bars.
we take away 3 of them, so there would end up being 7 left.
I assume your teacher is asking for you to write a numerical expression. In this case that would be 10-3=7.
The first one because it goes through pretty much all the points on the graph.