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Advanced Math / Equivalent expressions Difficulty: Easy

Which expression is equivalent to $50 x squared plus 5 x squared$ ?

$250 x squared$

$10 x squared$

$45 x squared$

$55 x squared$

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Explanation

Choice D is correct. The given expression shows addition of two like terms. Therefore, the given expression is equivalent to $left parenthesis 50 plus 5 right parenthesis x squared$ , or $55 x squared$ .

Choice A is incorrect. This expression is equivalent to $left parenthesis 50 right parenthesis left parenthesis 5 right parenthesis x squared$ , not $left parenthesis 50 plus 5 right parenthesis x squared$ .

Choice B is incorrect. This expression is equivalent to $left parenthesis StartFraction 50 Over 5 EndFraction right parenthesis x squared$ , not $left parenthesis 50 plus 5 right parenthesis x squared$ .

Choice C is incorrect. This expression is equivalent to $left parenthesis 50 minus 5 right parenthesis x squared$ , not $left parenthesis 50 plus 5 right parenthesis x squared$ .