Answer this please. ;-;

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

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