I really need help for this geometry question, I would appreciate any help thank you.

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

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.