{"id":"cb_practice_pdf:t7-math-m2-q9","source_id":"cb_practice_pdf","source_item_id":"t7-math-m2-q9","external_id":null,"ibn":null,"question_id":null,"program":"SAT","module":"math","domain_code":null,"domain":null,"skill_code":null,"skill":null,"difficulty":null,"score_band":null,"answer_type":"mcq","answer_source":"rationale","layout_warning":"Part of this question was typeset outside the text flow — a fraction, subscript or similar — and PDF extraction re-inserted it in the wrong place. The wording is reliable; the symbols may be out of order.","form_id":"cb_practice_pdf:test-7","module_number":2,"position":9,"stem":"23x^3 +2x^2 +9x Which expression is equivalent to? 23x +2x+9","stimulus":"","stimulus_html":null,"stem_html":"<p>23x^3 +2x^2 +9x Which expression is equivalent to? 23x +2x+9</p>","rationale_html":"<p>Choice C is correct. Since x is a common factor of each term in the given 23 2+2 +9 expression, the given expression can be rewritten as x^ x x h. 23 3+46 2+207 Choice A is incorrect. This expression is equivalent to x x x. 207 4+18 3+9 Choice B is incorrect. This expression is equivalent to x x x. 34 3+34 2+34 Choice D is incorrect. This expression is equivalent to x x x.</p>","correct_answer":["C"],"has_media":false,"has_mathml":false,"has_table":false,"source_created_at":null,"source_updated_at":null,"options":[{"label":"A","content_html":"<p>( x^2 ) 9x 23x^3 +2x^2 +1</p>","ord":0},{"label":"B","content_html":"<p>( ) 23x^2 +2x+9</p>","ord":1},{"label":"C","content_html":"<p>x ( )</p>","ord":2},{"label":"D","content_html":"<p>34 ( x^3 +x^2 +x )</p>","ord":3}],"attribution":{"source_id":"cb_practice_pdf","source_name":"College Board full-length SAT practice tests (PDF)","rights_holder":"College Board","canonical_url":"https://satsuite.collegeboard.org/practice/practice-tests/paper","retrieved_from":"https://satsuite.collegeboard.org/practice/practice-tests/paper","attribution":"Full-length SAT practice tests 4–11 © College Board, published free at satsuite.collegeboard.org.","disclaimer":"Extracted from PDF layout: equations, figures and tables do not survive intact. Use the original PDFs for anything the text renders poorly. SAT® is a trademark registered by the College Board, which is not affiliated with and does not endorse this project.","license":"College Board copyright. Free to download; not licensed for redistribution.","redistributable":false,"item_count":905}}