Question

Renan found the sum (4.2x + 3) + (5.7x – 2) + (5 – 2.6x), as shown.

4.2x + 3 + 5.7x – 2 + 5 – 2.6x

4.2x + 5.7x + 2.6x + 3 – 2 + 5

(4.2 + 5.7 + 2.6)x + 3 – 2 + 5

12.5x + 6

Answer 1

Answer:

He used the commutative property incorrectly.

Step-by-step explanation:

Answer 2

Answer:

a is correct

Step-by-step explanation: