Ithink of a number, add seven, then divide by 5. what is the number?

The sum of two numbers is 12 and their difference is 18 what are the two numbers

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?

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.