This question... it makes no sense.

Test Preparation SAT Preparation
1

<p>BB/Pg587/PT4/S2/#19</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=b/a
c) c/a=f/b
d) a/c=b/f
e) af/bc=1</p>

<p>How the heck do you do this?</p>

2

<p>Cross multiply each choice and it'll become obvious.</p>

3

<p><a href="http://talk.collegeconfidential.com/sat-preparation/552328-quick-math-help-bluebook.html?highlight=then+all+of+the+following+proportions+are+equivalent%5B/url%5D"&gt;http://talk.collegeconfidential.com/sat-preparation/552328-quick-math-help-bluebook.html?highlight=then+all+of+the+following+proportions+are+equivalent&lt;/a&gt;&lt;/p>

<p>I love the search function. Don't you?</p>

4

<p>got it. thanks :)</p>