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

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1 12 Practice Tests for the SAT
Practice Test Eleven Answers and Explanations
Therefore, the area of the rectangle is 12(b - 5), and the
area of the triangle is _!_ ( 1 2)(5) = 30. Adding these and
2
simplifying, we see this:
12(b - 5) + 30 = 12(b - 5) + 12(2.5)
= 12(b-2.5)
= 6(2b - 5)
You could also find the area by treating this figure as a
trapezoid with bases b and b - x and height 12:
b + b - x
A rea = h 2b - 5
2
x = --
2
x 12
= (b-%)x12
= 12b - 30
= 6(2b- 5)
15. D
Difficulty: High
Strategic Advice: The percent of tomato paste in the
mixture will be the amount of tomato paste in the soup
divided by the total amount of soup and water in the
mixture. It can be confusing to work a complex problem like
this one using variables, so if you're not sure about your
answer, you might want to try Picking Numbers instead.
Getting to the Answer:
The amount of tomato paste in s cups of soup is 10 percent
of s, or 10% x s. The total amount of soup and water is s + w.
Therefore, the percent of tomato paste in the mixture is
10s 0
s+w Vo.
16. D
Difficulty: High
Strategic Advice: There's no real shortcut to this problem;
you just need to list the numbers from 31 to 39 and
examine their factors to see which numbers have only two
prime factors.
Getting to the Answer:
Because 31 and 37 are prime themselves, they have only
one prime factor.
Now, 32 and 36 have too many factors; factors of 32 are 2,
4, 8, and 16, while factors of 36 are 2, 3, 4, 6, 9, 12, and 18.
And 33, 34, 35, 38, and 39 all have two factors that are both
prime; 33 = 11 (3), 34 = 1 7(2), 35 = 7(5), 38 = 19(2), and
39 = 13(3). That's five numbers, (D).
SECTION 9
1. B
Difficulty: Low
Transition words must express the correct relationship
between ideas.
As written, this sentence does not use an appropriate
transition to express the contrast between ideas. Choice (B)
corrects this with the transition word although. Choices (C)
and (E) express a cause-and-effect relationship between
the clauses that is inappropriate in context. Choice (D) is a
sentence fragment.
2. A
Difficulty: High
Don't mistake complex or formal sentence structure for
grammatical error. Eliminate answer choices methodically if
you don't spot an error, and remember-between five and
eight Writing section questions will be correct as written.
This sentence is correct as written. Choices (B) and (E) fail
to correctly complete the idiom just as ... so. Choices (C)
and (D) introduce verb tenses that are incorrect in context.
3. A
Difficulty: Medium
Be methodical in eliminating answer choices, but if you
don't spot an error, don't be afraid to choose (A).
This sentence is correct as written; the two independent
clauses are properly combined by the conjunction and.
Choices (B) and (D) are run-on sentences. Choices (C) and
(E) introduce verb tenses that are incorrect in context.
4. E
Difficulty: High
Some idiomatic and comparative structures require parallel
structure.
The idiomatic phrase at once must be completed with
the conjunction and, and the items combined must be in
parallel form. Choice (E) corrects both errors. Choices (B)
and (D) do not address either error. Choice (C) corrects the
idiom, but not the parallelism.