Fill in the property that justifies the step in simplifying the equation, 4a + 8 + 3(a + 5).
Statement:
1. 4a + 8 + 3a + 15
2. 4a + 3a + 8 + 15
3. 4a + 3a + (8 + 15)
4. 4a + 3a + 23
5. (4 + 3)a + 23
6. 7a + 23

Question

Fill in the property that justifies the step in simplifying the equation, 4a + 8 + 3(a + 5). 
Statement: 
1. 4a + 8 + 3a + 15
2. 4a + 3a + 8 + 15
3. 4a + 3a + (8 + 15)
4. 4a + 3a + 23
5. (4 + 3)a + 23
6. 7a + 23

anonymous · Answer

1. distributive property
2. commutative property 
3. associative property
4. ?? simplify
5. associative
6. simplify

you might need to get a second opinion on this