Question

Rhett is showing his work in simplifying (−7.9 + 5.2) − 1.4.

Step 1: (5.2 − 7.9) − 1.4
Step 2: 5.2 − (7.9 + 1.4)
Step 3: 5.2 − (9.3)
Step 4: −4.1

Which statement is true?

In step 1, Rhett used the distributive property.
In step 2, Rhett used the associative property.
In step 3, Rhett used the commutative property.
In step 4, Rhett's answer is incorrect.