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Llana [10]
3 years ago
15

The expression 2 + 3(x + 3) + x is simplified correctly in the correct order. Which of these steps has an incorrect justificatio

n?

Mathematics
2 answers:
DaniilM [7]3 years ago
6 0

Answer:

c. is incorrect

Step-by-step explanation:

2 + 3(x + 3) + x

<em>use the Distributive property a(b + c) = ab + ac</em>

= 2 + 3x + 9 + x     <em>a. is correct</em>

<em>use the Commutative property of addition: a + b = b + a</em>

= 2 + 9 + 3x + x     <em>addition</em>

= (2 + 9) + 3x + x

= 11 + 3x + x        <em>b. is correct</em>

<em>use the </em><em>Distributive property</em><em> a(b + c) = ab + ac</em><em> </em>

<em>not Associative property (a + b) + c = a + (b + c)</em>

= 11 + (3 + 1)x      <em>c. is incorrect</em>

= 11 + 4x

<em>use the Commutative property of addition: a + b = b + a</em>

= 4x + 11

adoni [48]3 years ago
5 0

Answer:

step c would be your sum

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