Whats the answer will mark bl

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?