Write an expression let x represent the number if tickets sold, and y represent the total amount of money raised

Hey hotel charges guests $19.75 a day to rent five video games at this rate which expression can be used to determine the charge for renting nine video games for one day at this hotel? pls

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2

What is the simplified form of square root of 400 to the 100th power ?