Select the correct reasons for statements 1 and 3 to complete the proof.
Prove: 5x + 9 • x • 3 = 32x
1. 5x + 9 • x • 3 = 5x + 9 • 3 • x 1.?
2. 5x + 9 • x • 3 = 5x + 27x 2. Multiplication
3. 5x + 9 • x • 3 = 32x 3.?
Associative Property of Addition, Addition
Associative Property of Multiplication, Addition
Commutative Property of Multiplication, Addition
Commutative Property of Multiplication, Multiplication
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