A sandwich store charges $20 to have 3 turkey subs delivered and $26 to have 4 delivered.

Is the relationship between number of turkey subs delivered and amount charged proportional?
How much does the store charge for 1 additional turkey sub?

Jane is cooking beans and rice for dinner tonight. she has 4 cans of black beans, 6 cans of red beans, and 3 cans of garbanzo beans in her cupboard. if she grabs a can of beans without looking at the label, what is the probability of her making black beans and rice for dinner?