You bought a total of 11 subs. the foot long subs cost $8 and the six-inch subs cost $4. your total cost was $36. how many foot long subs and how many six-inch subs did you buy?

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

Which will form a composite function?

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =