Which function is a linear function? A. 1 − 3x2 = -y B. y + 7 = 5x C. x3 + 4 = y D. 9(x2 − y) = 3 E. y − x3 = 8

How do i do this? i don’t understand

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?

How many doughnuts are equal to 20 cookies.? 3 apples = 5 bananas6 cookies = 7 apples2 doughnuts = 1 banana