Which of the following are roots of the polynomial function? Check all that apply. F(x) = x3 + 3x2 -9x + 5

Evaluate the expression for the given value of the variable 7a - 4a for a =8

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?