Respuesta :

wegnerkolmp2741o

Answer:

B) 8.182

Step-by-step explanation:

x + a = b

We know  x = 4.907 and b = 13.089.  Substitute these values into the equation

4.907 +a = 13.089

Subtract 4.907 from each side

4.907 - 4.907 +a = 13.089-4.907

a =8.182