Calculate the distance between the points -11 and 4 on a number
line.

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Solve the given system of equations. 2y= -x+9 , 3x-6= -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?