Pls help me find the reason in the missing box :(

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

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