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Advanced Math / Equivalent expressions Difficulty: Easy

Which expression is equivalent to $9 x + 6 x + 2 y + 3 y$ ?

$3 x plus 5 y$

$6 x plus 8 y$

$12 x plus 8 y$

$15 x plus 5 y$

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Explanation

Choice D is correct. Combining like terms in the given expression yields $(9 x + 6 x) + (2 y + 3 y)$ , or $15 x plus 5 y$ .

Choice A is incorrect and may result from conceptual or calculation errors.

Choice B is incorrect and may result from conceptual or calculation errors.

Choice C is incorrect and may result from conceptual or calculation errors.