Heyy whats 300+7000???

Answer soon(fast) 15 pts-brainliest? for right answer with small explination a restaurant catered a party for 40 people. a child’s dinner (c) cost $11 and an adult’s dinner (a) cost $20. the total cost of the dinner was $728. how many children and adults were at the party? use the table to guess and check.(i couldn't get the graph onto the question)                                8 children and 32 adults9 children and 31 adults10 children and 30 adults12 children and 28 adults

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

Aof 12 , we to a of 4 to on a .of 4 be ?