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Blue bars are $x$ units long and yellow bars are 3 units long. Which bar model shows $2 (x + 3)$ ?

Class 6Forming ExpressionsAlgebra

AB
BA
CC
DD

Step-by-Step Solution

2 (x + 3)

means two copies of

(x + 3) : x, 3, x, 3

, which is model B. A is

2 x + 3

, C is

x + 6

, and D is

2 x + 9

.

Answer: A) B

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