Can someone help me with this

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

3x + 4y = 5 x- 3y = -7 solve by substitution

Jim had 15 minutes to do 5 laps around his school what would his time be