Respuesta :

Remba

Answer:

a = -5

Step-by-step explanation:

a = 1/2(-10) + 3^2 - (-1) - 10

a = -5 + 3^2 - (-1) -10

a = -5 + 9 - (-1) - 10

a = 4 - (-1) - 10

a = 4 + 1 - 10

a = 5 - 10

a = -5

                                         

x = -1y = 3

z = -10

a = -5

-5 because you plug in all the numbers and that’s what it gets you