Help guickly i'm timed! and i will mark brailyest Identify the property used in each step.

12.2 + 18.6 + –4.3 + (–18.6)

12.2 + –4.3 + 18.6 + (–18.6)

12.2 + –4.3 + [18.6 + (–18.6)]

12.2 + –4.3 + (0)

12.2 + –4.3

7.9

the answer is a.

135 and 80

step-by-step explanation:

where does the z at is it on the x axes or on the y axes any way if it is on the y axes put it horizontally and if it is on the x axes put it vertically

ѕнє ¢αи ∂яινє 132 кιℓσмєтєяѕ

нσρє ι ¢συк∂ нєℓρ