Atruck is 44 feet long how many of these truck lengths would it take to make a mile

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

Can someone me with this problem i don't understand i need

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)