Which one of the following relations is not a function, but becomes a function when its coordinates are switched? a) 99y = 23/98x +5
b) sinx - 2y = 5
c) x^2 + y^2 = 9
d) y^2 + square root of x = 2

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

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?