Solve and show ur work so I can see how u got ur answer (Will mark as )

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

Aphrase is shown read the phrase and give me the answer

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