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12.Practice.Tests.for.the.SAT_2015-2016_1128p

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12 Practice <strong>Tests</strong> <strong>for</strong> <strong>the</strong> <strong>SAT</strong><br />

Practice Test Nine Answers and Explanations<br />

835<br />

I<br />

14. E<br />

Difficulty: High<br />

Strategic Advice: Inequalities work just like equations, with<br />

<strong>the</strong> exception that if you multiply or divide by a negative<br />

number, you must change <strong>the</strong> direction of <strong>the</strong> sign.<br />

Remember that ei<strong>the</strong>r a positive or a negative number<br />

will produce a positive number when squared. Finding <strong>the</strong><br />

negative square root of a number is <strong>the</strong> same as multiplying<br />

<strong>the</strong> inequality by -1, so you have to change <strong>the</strong> direction of<br />

<strong>the</strong> sign <strong>for</strong> <strong>the</strong> negative square root.<br />

Getting to <strong>the</strong> Answer:<br />

.c r:r;<br />

b<br />

ac = va<br />

g3 = vg2<br />

2 .3<br />

V92 > 4<br />

(Vg'2)3 > (4)3<br />

g2 >64<br />

g> 8 org

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