The amount of time it takes to finish a race might be a function of?

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?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.