Final answer:
The correct expression to calculate the total cost of renting movies is 3x + 4y (option 1), indicating new releases cost $3 each and standard rentals cost $4 each.
Step-by-step explanation:
To determine how much money you will need for renting movies, we need to know the cost of each type of rental. Let's assume that x represents the number of new releases rented, and y represents the number of standard rentals. Then, if we know the cost per new release and per standard rental, we can form an equation to calculate the total cost.
For example, if the cost for each new release is 3 dollars and each standard rental is 4 dollars, the expression would be 3x + 4y. This expression multiplies the number of each type of rental by its respective cost, and then adds the two to get the total cost. The expression 7(x + y) would imply that both types of rentals have the same cost, which is 7 dollars, but since new releases and standard rentals often have different costs, this is less likely unless specified otherwise.