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31 January, 13:55

A teacher asked the class to solve the equation 3 (x + 2) = 21.

Robert wrote 3x + 6 = 21 as his first step. Which property did he use?

(1) associative property (3) distributive property

(2) commutative property (4) zero property of addition

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Answers (2)
  1. 31 January, 16:30
    0
    It is the distubitive property because he got rid of the ()
  2. 31 January, 17:33
    0
    3) distributive property

    Robert had given 3 to each term. which then results in 3x+6=21. Then. if he further went on, you would subtract 6 from each side giving you 15 then divide 15 by 3 giving you x=5.
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Home » Mathematics » A teacher asked the class to solve the equation 3 (x + 2) = 21. Robert wrote 3x + 6 = 21 as his first step. Which property did he use? (1) associative property (3) distributive property (2) commutative property (4) zero property of addition
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