Question

identify the property that justifies each step asked about in the answer area below. line 1: s(r + 7) line 2: sr + s·7 line 3: rs + 7s answer attempt 1 out of 2 line 1 to line 2: line 2 to line 3:

Explanation:

Step1: Identify property from Line 1 to Line 2

The distributive property $a(b + c)=ab+ac$ is used, where $a = s$, $b = r$ and $c = 7$. So $s(r + 7)=sr+s\cdot7$.

Step2: Identify property from Line 2 to Line 3

The commutative property of multiplication $ab=ba$ is used. For $sr$, we can rewrite it as $rs$ and for $s\cdot7$ we can rewrite it as $7s$.

Answer:

Line 1 to Line 2: Distributive property
Line 2 to Line 3: Commutative property of multiplication