Anyone know the answer? ? and can someone pls explain to me? (circled ones)

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Suppose you can spend at most $12. create an inequality that represents this restraint. then find at least three ordered pair solutions representing the number of boxes of candy and combos you can buy

The minimum height for riding on the super screaming spinner at the theme park is 52 inches. which of the following expressions shows the height to ride?