{"id":21320,"date":"2026-05-25T22:28:09","date_gmt":"2026-05-25T16:28:09","guid":{"rendered":"https:\/\/mcqacademy.com\/en\/mcq\/perform-an-introductory-matrix-operation-4\/"},"modified":"2026-05-25T22:28:09","modified_gmt":"2026-05-25T16:28:09","slug":"perform-an-introductory-matrix-operation-4","status":"publish","type":"mcq","link":"https:\/\/mcqacademy.com\/en\/mcq\/perform-an-introductory-matrix-operation-4\/","title":{"rendered":"Perform an introductory matrix operation"},"content":{"rendered":"<p>Multiply the matrix [[5, 1], [0, -5]] by -2.<\/p>\n<ul class=\"quiz-options\">\n<li>[[5, -2], [0, -5]]<\/li>\n<li>[[-10, -2], [0, 10]]<\/li>\n<li>[[3, -1], [-2, -7]]<\/li>\n<\/ul>\n","protected":false},"author":39,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","topic":[2889,2721],"subject":[2750],"education_level":[1894],"class_list":["post-21320","mcq","type-mcq","status-publish","hentry","topic-advanced-algebra","topic-matrices","subject-advanced-mathematics","education_level-grade-8"],"mcq_note":"Scalar multiplication means multiply every entry by -2. Do not multiply only one row or one column. A scalar multiplies each entry of the matrix separately. The position of each entry stays the same; only its value changes. Matrix operations require attention to position, so avoid mixing entries from different rows or columns. The correct answer is [[-10, -2], [0, 10]], which matches the calculation or reasoning shown.","mcq_options":[{"right":"no","answer":"[[5, -2], [0, -5]]"},{"right":"yes","answer":"[[-10, -2], [0, 10]]"},{"right":"no","answer":"[[3, -1], [-2, -7]]"}],"multi_answers":"no","subject_terms":[{"id":2750,"title":"Advanced Mathematics","slug":"advanced-mathematics"}],"topic_terms":[{"id":2889,"title":"Advanced Algebra","slug":"advanced-algebra"},{"id":2721,"title":"Matrices","slug":"matrices"}],"_links":{"self":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/mcq\/21320","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/mcq"}],"about":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/types\/mcq"}],"author":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/users\/39"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/comments?post=21320"}],"wp:attachment":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/media?parent=21320"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/topic?post=21320"},{"taxonomy":"subject","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/subject?post=21320"},{"taxonomy":"education_level","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/education_level?post=21320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}