Answer: Hey There!!
The answer to this is Step 2: Distributive Property: a(b + 3) = ab + ac
Isaac's Steps are outlined below:
Step 1: (4.2) (-54) = (-54) (4.2)
Step 2: = (-5.4) (4) + (-5.4) (0.2)
Step 3: = (-21.6) + (-1.08)
Step 4: = 22.68
We observe that in Step 2:
(-5.4) (4.2) = (-5.4) (4 × 0.2) = (-5.4) (4) + (-5.4) (0.2)
Therefore, Isaac applied the distributive property in Step 2.
Hope It Helped!~ ♡
ItsNobody~ ☆