{"appState":{"pageLoadApiCallsStatus":true},"articleState":{"article":{"headers":{"creationTime":"2017-05-01T02:49:49+00:00","modifiedTime":"2017-05-01T02:49:49+00:00","timestamp":"2022-09-14T18:18:39+00:00"},"data":{"breadcrumbs":[{"name":"Academics & The Arts","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33662"},"slug":"academics-the-arts","categoryId":33662},{"name":"Teaching","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33800"},"slug":"teaching","categoryId":33800},{"name":"Skills Tests","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33806"},"slug":"skills-tests","categoryId":33806},{"name":"Praxis","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33807"},"slug":"praxis","categoryId":33807}],"title":"Practice Math Questions for Praxis: Solving Functions","strippedTitle":"practice math questions for praxis: solving functions","slug":"practice-math-questions-praxis-solving-functions","canonicalUrl":"","seo":{"metaDescription":"If you enjoy solving functions (and why wouldn't you?), then you'll have a great time on the Praxis Core exam. The following practice questions will help you pu","noIndex":0,"noFollow":0},"content":"If you enjoy solving functions (and why wouldn't you?), then you'll have a great time on the Praxis Core exam. The following practice questions will help you put the fun into \"function\" by asking you to first solve a simple function, and then to find the value of two functions combined!\r\n<h2 id=\"tab1\" >Practice questions</h2>\r\n<ol>\r\n\t<li>If f(x) = x – 2, what is the value of f(3)?\r\n\r\nA. 1\r\nB. 4\r\nC. 3\r\nD. 0\r\nE. 2</li>\r\n\t<li>For the two following functions, what is the value of f(g(1))?\r\n\r\nf(x) = 8x2 – 2x + 12\r\n\r\ng(x) = 3x + 5\r\n\r\nA. 508\r\nB. 415\r\nC. 29\r\nD. 580\r\nE. 18</li>\r\n</ol>\r\n<h2 id=\"tab2\" >Answers and explanations</h2>\r\n<ol>\r\n\t<li>The correct answer is Choice (A).\r\n\r\nBecause f(3) replaces the x in f(x) with 3, put 3 in for x in x – 2:\r\n\r\n<a href=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2501.gif\"><img class=\"alignnone size-full wp-image-239050\" src=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2501.gif\" alt=\"PRAXIS_2501\" width=\"83\" height=\"79\" /></a></li>\r\n\t<li>The correct answer is Choice (A).\r\n\r\nFirst, find the value of g(1):\r\n\r\n<a href=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2502.gif\"><img class=\"alignnone size-full wp-image-239051\" src=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2502.gif\" alt=\"PRAXIS_2502\" width=\"104\" height=\"103\" /></a>\r\n\r\nBecause g(1) is 8, f(g(1)) is f(8):\r\n\r\n<a href=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2503.gif\"><img class=\"alignnone size-full wp-image-239052\" src=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2503.gif\" alt=\"PRAXIS_2503\" width=\"167\" height=\"136\" /></a>\r\n\r\nTherefore, f(g(1)) is 508, Choice (A).</li>\r\n</ol>","description":"If you enjoy solving functions (and why wouldn't you?), then you'll have a great time on the Praxis Core exam. The following practice questions will help you put the fun into \"function\" by asking you to first solve a simple function, and then to find the value of two functions combined!\r\n<h2 id=\"tab1\" >Practice questions</h2>\r\n<ol>\r\n\t<li>If f(x) = x – 2, what is the value of f(3)?\r\n\r\nA. 1\r\nB. 4\r\nC. 3\r\nD. 0\r\nE. 2</li>\r\n\t<li>For the two following functions, what is the value of f(g(1))?\r\n\r\nf(x) = 8x2 – 2x + 12\r\n\r\ng(x) = 3x + 5\r\n\r\nA. 508\r\nB. 415\r\nC. 29\r\nD. 580\r\nE. 18</li>\r\n</ol>\r\n<h2 id=\"tab2\" >Answers and explanations</h2>\r\n<ol>\r\n\t<li>The correct answer is Choice (A).\r\n\r\nBecause f(3) replaces the x in f(x) with 3, put 3 in for x in x – 2:\r\n\r\n<a href=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2501.gif\"><img class=\"alignnone size-full wp-image-239050\" src=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2501.gif\" alt=\"PRAXIS_2501\" width=\"83\" height=\"79\" /></a></li>\r\n\t<li>The correct answer is Choice (A).\r\n\r\nFirst, find the value of g(1):\r\n\r\n<a href=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2502.gif\"><img class=\"alignnone size-full wp-image-239051\" src=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2502.gif\" alt=\"PRAXIS_2502\" width=\"104\" height=\"103\" /></a>\r\n\r\nBecause g(1) is 8, f(g(1)) is f(8):\r\n\r\n<a href=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2503.gif\"><img class=\"alignnone size-full wp-image-239052\" src=\"https://www.dummies.com/wp-content/uploads/PRAXIS_2503.gif\" alt=\"PRAXIS_2503\" width=\"167\" height=\"136\" /></a>\r\n\r\nTherefore, f(g(1)) is 508, Choice (A).</li>\r\n</ol>","blurb":"","authors":[{"authorId":9383,"name":"Carla Kirkland","slug":"carla-kirkland","description":"","hasArticle":false,"_links":{"self":"https://dummies-api.dummies.com/v2/authors/9383"}},{"authorId":9384,"name":"Chan Cleveland","slug":"chan-cleveland","description":" Carla C. Kirkland is CEO of The Kirkland Group, a consulting firm providing professional development, technical assistance, and standardized test preparation to schools. Chan Cleveland, Executive Vice President of The Kirkland Group, has created and revised language arts standards for many school districts. ","hasArticle":false,"_links":{"self":"https://dummies-api.dummies.com/v2/authors/9384"}}],"primaryCategoryTaxonomy":{"categoryId":33807,"title":"Praxis","slug":"praxis","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33807"}},"secondaryCategoryTaxonomy":{"categoryId":0,"title":null,"slug":null,"_links":null},"tertiaryCategoryTaxonomy":{"categoryId":0,"title":null,"slug":null,"_links":null},"trendingArticles":null,"inThisArticle":[{"label":"Practice questions","target":"#tab1"},{"label":"Answers and explanations","target":"#tab2"}],"relatedArticles":{"fromBook":[{"articleId":239134,"title":"Practice Math Questions for Praxis: Pyramids","slug":"practice-math-questions-praxis-pyramids","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/239134"}},{"articleId":239130,"title":"Practice Math Questions for Praxis: Cones","slug":"practice-math-questions-praxis-cones","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/239130"}},{"articleId":239125,"title":"Practice Math Questions for Praxis: Cylinders","slug":"practice-math-questions-praxis-cylinders","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/239125"}},{"articleId":239121,"title":"Practice Math Questions for Praxis: Prisms","slug":"practice-math-questions-praxis-prisms","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/239121"}},{"articleId":239090,"title":"Practice Math Questions for Praxis: Similar and Congruent Shapes","slug":"practice-math-questions-praxis-similar-congruent-shapes","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/239090"}}],"fromCategory":[{"articleId":268458,"title":"Capitalization: What You Need to Know for the Praxis Core","slug":"capitalization-what-you-need-to-know-for-the-praxis-core","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/268458"}},{"articleId":268455,"title":"Identify and Correct Errors in Praxis Core Selected-Response Items","slug":"identify-and-correct-errors-in-praxis-core-selected-response-items","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/268455"}},{"articleId":268441,"title":"How Data is Represented on the Praxis Core Exam","slug":"how-data-is-represented-on-the-praxis-core-exam","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/268441"}},{"articleId":268435,"title":"How to Narrow Down Answer Choices on the Praxis Math Test","slug":"how-to-narrow-down-answer-choices-on-the-praxis-math-test","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/268435"}},{"articleId":268426,"title":"Visual- and Quantitative-Information Questions on the Praxis Reading Test","slug":"visual-and-quantitative-information-questions-on-the-praxis-reading-test","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/268426"}}]},"hasRelatedBookFromSearch":false,"relatedBook":{"bookId":282493,"slug":"praxis-core-1001-practice-questions-for-dummies","isbn":"9781119263883","categoryList":["academics-the-arts","teaching","skills-tests","praxis"],"amazon":{"default":"https://www.amazon.com/gp/product/1119263883/ref=as_li_tl?ie=UTF8&tag=wiley01-20","ca":"https://www.amazon.ca/gp/product/1119263883/ref=as_li_tl?ie=UTF8&tag=wiley01-20","indigo_ca":"http://www.tkqlhce.com/click-9208661-13710633?url=https://www.chapters.indigo.ca/en-ca/books/product/1119263883-item.html&cjsku=978111945484","gb":"https://www.amazon.co.uk/gp/product/1119263883/ref=as_li_tl?ie=UTF8&tag=wiley01-20","de":"https://www.amazon.de/gp/product/1119263883/ref=as_li_tl?ie=UTF8&tag=wiley01-20"},"image":{"src":"https://www.dummies.com/wp-content/uploads/praxis-core-1001-practice-questions-for-dummies-cover-9781119263883-204x255.jpg","width":204,"height":255},"title":"Praxis Core: 1,001 Practice Questions For Dummies","testBankPinActivationLink":"","bookOutOfPrint":false,"authorsInfo":"Carla Kirkland, founder and CEO of the Kirkland Group, an educational consulting firm, has helped educators prepare their students for standardized tests for more than 20 years. 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Practice Math Questions for Praxis: Solving Functions

By: Carla Kirkland and Chan Cleveland and

Updated: 05-01-2017

From The Book: Praxis Core: 1,001 Practice Questions For Dummies

Praxis Core: 1,001 Practice Questions For Dummies

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If you enjoy solving functions (and why wouldn't you?), then you'll have a great time on the Praxis Core exam. The following practice questions will help you put the fun into "function" by asking you to first solve a simple function, and then to find the value of two functions combined!

Practice questions

If f(x) = x – 2, what is the value of f(3)?
A. 1 B. 4 C. 3 D. 0 E. 2
For the two following functions, what is the value of f(g(1))?
f(x) = 8x² – 2x + 12
g(x) = 3x + 5
A. 508 B. 415 C. 29 D. 580 E. 18

Answers and explanations

The correct answer is Choice (A). Because f(3) replaces the x in f(x) with 3, put 3 in for x in x – 2:
The correct answer is Choice (A). First, find the value of g(1):
Because g(1) is 8, f(g(1)) is f(8):
Therefore, f(g(1)) is 508, Choice (A).

About This Article

This article is from the book:

Praxis Core: 1,001 Practice Questions For Dummies ,

About the book authors:

Carla Kirkland, founder and CEO of the Kirkland Group, an educational consulting firm, has helped educators prepare their students for standardized tests for more than 20 years.

Chan Cleveland, executive vice president of the Kirkland Group, is an English educator who has developed language arts resources for multiple school districts.

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