If x varies directly as y, find x when y = 8.
x = -4 when y = 10
X =

What is the square root of 45? (step by step working plz)

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

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?