Use basic identities to simplify the expression. sec y sin (pi/2-y)​

Which equation requires the division property of equality to be solved?

What is the solution set of the quadratic inequality x^2-5< or equal to 0

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?