I’m crying what is 5/10 times 2/4 show step by step and simplified

Find the commission on a $590.00 sale if the commission is 15%.

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?

The product of 3 and a number increased by 8 is 31