Jordan can solve 12 math problems in 3 minutes. How long will it take him to solve 45 problems?

This is about circle theorems. someone asap : (

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?