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

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1 12 Practice Tests for the SAT
Practice Test Twelve Answers and Explanations
19. A
Difficulty: Medium
Questions like these require you to characterize how or
why details in the passage show similarity between the two
authors' points of view. The author of Passage 1 discusses
the Internet solely as a business, or business tool. The
author of Passage 2 discusses the Internet's impact on
human knowledge. The second author also states that
business can generate revenue while furthering global
information storage and exchange. You can link that to the
first author's idea that the Internet holds financial promise;
both details indicate that the Internet can make money,
even though the authors disagree on its primary uses.
Choice (A) is correct; this matches the ideas behind these
details. Choice (B) is out of scope; neither author discusses
whether the Internet itself should be free, and both suggest
ways to generate revenue from it. Choice (C) is out of
scope; only the author of Passage 1 discusses broadband
access. Regardless, neither author discusses broadband
fees. Choice (D) is out of scope; although the author of
Passage 2 discusses digitizing media and other content,
neither author discusses how to deal with intellectual
property issues. Choice (E) is extreme; while both authors
discuss revenue and business to some extent, neither one
goes so far as to suggest this.
SECTION 8
1. A
Difficulty: Low
Strategic Advice: Algebra problems that appear to be
straightforward may be just that: straightforward. So don't make
them more difficult than they are. Focus on carefully working
through the necessary steps until you have your answer.
Getting to the Answer:
4x + 2 = 26
4x =24
X =6
Plug 6 in for x in the expression 4x + 8:
4(6) + 8 = 24 + 8 = 32
2. c
Difficulty: Medium
Strategic Advice: Set up a proportion.
Getting to the Answer:
60 x
100 20y
Then, cross-multiply to find your missing y-value:
60 x 20y = 100 xx
1 ,200y = l OOx
1,200y = 12 y
100
3. B
Difficulty: Low
Strategic Advice: Check each choice, one at a time.
Getting to the Answer:
(A) x2 + 8x2 equals 9x2.
(B), however, doesn't: To add 4x and 5x, you add just the
coefficients and keep the variable part the same.
So, 4x + 5x = 9x. Choices (C), (D), and (E) are each equal
to 9x2.
4. B
Difficulty: Medium
Strategic Advice: Remember to follow the order of
operations and work carefully, and you should have no
trouble with this function problem and others like it.
Getting to the Answer:
(72 - 7) - ( 49 - 7) - 42 -
(7 + 7) - (7 + 7) - 14 - 3
5. B
Difficulty: Medium
Strategic Advice: Questions such as this one reward test
takers who resist the impulse to rush into calculation and,
instead, step back and think about the sorts of numbers
they're dealing with. Notice that in each choice, the median
is zero. The question then boils down to which choice has
an average greater than zero.
Getting to the Answer:
No calculations are necessary to determine that in (A), (C),
and (E), the average is zero. (A) is a set of evenly spaced
numbers-in such a situation, the median and the average
are equal. Choices (C) and (E) are merely variations on
this theme: in each case, the middle three numbers are
evenly spaced, and the numbers on either end of the set