Respuesta :

Answer:

- 40

Step-by-step explanation:

When a = 4, and x = -4:

Evaluating algebraic expressions simply involve substituting the given values for a and x into the expression, -9a + x.

Hence, -9a + x = -9(4) + (-4) = -36 - 4 = -40

Therefore, the correct answer is -40.