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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 I<br />

119<br />

Choice (A) is distortion; <strong>the</strong> author's argument involves<br />

vocal interaction, not necessarily interaction in general,<br />

which need not be vocal. Choice (B) is correct; by<br />

interacting more frequently with <strong>the</strong>ir child, parents can<br />

help that child to more quickly distinguish <strong>the</strong>ir voices and<br />

<strong>the</strong>re<strong>for</strong>e help <strong>the</strong>m to acquire language skills earlier than<br />

o<strong>the</strong>r children. Choice (C) is out of scope; nothing in <strong>the</strong><br />

paragraph refers to <strong>the</strong> complexity of any given language.<br />

Choice (D) is distortion; <strong>the</strong> example in <strong>the</strong> question only<br />

refers to familiar voice streams and a parent speaking to an<br />

infant, not necessarily parents who pay close attention to an<br />

infant. Choice (E) is distortion; as <strong>the</strong> paragraph indicates<br />

that most infants can separate out unfamiliar voices,<br />

removing such sounds seems unnecessary.<br />

SECTION 5<br />

1. D<br />

Difficulty: Low<br />

Strategic Advice: Read <strong>the</strong> stem carefully to translate <strong>the</strong><br />

sentence into <strong>the</strong> correct equations.<br />

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

t=s+ 5<br />

s=r-3<br />

When r=3,<br />

s=O<br />

So,<br />

t=O+ 5<br />

t=S<br />

2. c<br />

Difficulty: Low<br />

Strategic Advice: Early questions like this one are not trying<br />

to trick you or test your ability to think critically, but ra<strong>the</strong>r<br />

just to follow directions carefully. Remember this, and you<br />

can rack up easy points on Test Day.<br />

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

If you happen to notice that <strong>the</strong> difference between <strong>the</strong><br />

numerator and denominator is <strong>the</strong> same <strong>for</strong> both fractions,<br />

<strong>the</strong>n you can tell that y = 42 and y-3 = 39. If you don't<br />

see that right away, you can ei<strong>the</strong>r Backsolve or crossmultiply<br />

and solve <strong>for</strong> y.<br />

3. c<br />

Difficulty: Low<br />

Strategic Advice: Angles along a straight line add<br />

up to 180°. When a line intersects two parallel lines,<br />

corresponding angles are equal. If <strong>the</strong> lines are not parallel,<br />

<strong>the</strong> corresponding angles cannot be equal.<br />

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

You know that <strong>the</strong> lines are not parallel, so adding x0 to 98°<br />

cannot equal 1 80°. There<strong>for</strong>e, x cannot equal 82.<br />

4. A<br />

Difficulty: Medium<br />

Strategic Advice: If two chords have equal length, <strong>the</strong>y are<br />

<strong>the</strong> same distance from <strong>the</strong> center of <strong>the</strong> circle. Remember<br />

to add all <strong>the</strong> in<strong>for</strong>mation from <strong>the</strong> question stem to <strong>the</strong><br />

figure.<br />

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

Since EFCH is a square, its area is equal to <strong>the</strong> length of a<br />

side squared:<br />

81 = (EF)2<br />

9=ff<br />

Since <strong>the</strong> chords are <strong>the</strong> same distance from <strong>the</strong> center of<br />

<strong>the</strong> circle, EJ = KF.<br />

- - - -<br />

EF = EJ +JK + KF<br />

9 = 5 + 2(EJ)<br />

4 = 2(EJ)<br />

2=EJ<br />

5. c<br />

Difficulty: Medium<br />

Strategic Advice: You can use concrete numbers to get a<br />

handle on <strong>the</strong> situation.<br />

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

Try a = 6 and b = 3.<br />

(A) a + b = 9, eliminate<br />

(B) a - b = 3, eliminate<br />

(C) a+b+ 1=10<br />

(D) ab = 18, eliminate<br />

(E) ab + 3 = 21, eliminate

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