What is the sin inverse of (sine 9pi/7)?

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

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?