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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 One Answers and Explanations<br />

121<br />

12. 8<br />

Difficulty: Medium<br />

Strategic Advice: Draw a quick sketch to help you find <strong>the</strong><br />

solution to this problem. Also, remember that if a circle<br />

touches an axis at one and only one point, <strong>the</strong>n <strong>the</strong> distance<br />

from that point to <strong>the</strong> center of <strong>the</strong> circle is <strong>the</strong> radius.<br />

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

15. 150<br />

Difficulty: Medium<br />

Strategic Advice: Sketch in <strong>the</strong> in<strong>for</strong>mation that isn't<br />

included in <strong>the</strong> diagram and work from <strong>the</strong>re. Don't let <strong>the</strong><br />

polygon fool you. This is a triangle problem.<br />

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

Resketch <strong>the</strong> figure:<br />

y<br />

e<br />

Once you draw a sketch, it is easy to see that <strong>the</strong> radius is<br />

equal to <strong>the</strong> x coordinate of <strong>the</strong> center of <strong>the</strong> circle, 8.<br />

1 32<br />

3.<br />

9<br />

Difficulty: Medium<br />

Strategic Advice: Plug in carefully-don't confuse <strong>the</strong> two<br />

functions!<br />

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

3 2=x3+ 2x2=1+ = 2<br />

3 3 3 3<br />

2

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