Help me out here pls

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?