1 basket with 8 green apples = 8
3 baskets with g green apples = 3g
Expression 8 + 3g
Result = 8 + 3g, the last choice
Second question
Number of cases = 15
Numberf of times = 2
Number of cartons = c
So the expression is: 2(15c)
Also is correct the first one: 2c + 15c