Math Q help aqui

Test Preparation SAT Preparation
1

<p>page 587 Q 19 in the blue book:</p>

<p>If a, b, c, and f are four nonzero numbers, then all of the following proportions are equivalent EXCEPT:</p>

<p>(A) (a/f) = (b/c)
(B) (f/c) = (a/b)
(C) (c/a) = (f/b)
(D) (a/c) = (b/f)
(E) (af)/(bc) = 1/1</p>

<p>Yeah...</p>

2

<p>Look it up in <a href="http://talk.collegeconfidential.com/sat-preparation/339734-consolidated-list-blue-book-math-solutions-3rd-ed.html%5B/url%5D"&gt;http://talk.collegeconfidential.com/sat-preparation/339734-consolidated-list-blue-book-math-solutions-3rd-ed.html&lt;/a&gt;&lt;/p>

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<p>thanks! i didn't know that exists!</p>

4

<h1>enjoy!</h1>