Number 18??? I need help

What statement is true? 2x^2-9x+2=-1

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?