4.5 bl、r•c, v1 « Answer Explanations
Arithmetic
Since the numerator of all of the fractions in the
answer choices is 0.03, the least of the fractions
will be the fraction with the greatest denominator.
The greatest denominator is 7.1, and so the least
of the fractions is 0.03
7.1.The correct answer is E.
PS07385- The maximum recommended pulse rate R, when
exercising, for a person who is x years of age is given
by the equation R = 176 - 0.8x. What is the age, in
years, of a person whose maximum recommended
pulse rate when exercising is 140?
(A) 40
(B) 45
(C) 50
(D) 55
(E) 60Algebra bst•tut1or; Gpl rc,tlo户w1tl-: r心IC•压l
Substitute 140 for R in the given equation and
solve for x.140 = 176—0.8x
-^36 = -^0 .8x
- 36
— =x
0.8
45 =x
The correct answer is B.
PS08011- If the average (arithmetic mean) of 5 numbers
j, j + 5,^2 j - 1,^4 j - 2, and^5 j- 1 is 8, what is the
value of j?
Algebra , t�rl叩r�'."'叩u.-t1onJ + (J + 5) + (2J-1) + (4J- 2) + (5J -1)
5= (^8) given
j + (j+^5 ) + (q'-^1 ) + (4i-2) + (5}-^1 ) =^40 multiply
both sides
by 5
13}+ 1 = 40 combine
like terms
13}= 39 subtract 1
from both
sides
j = 3 divide
both sides
by 13
1h e correct answer 1s D.
PS14037
(^1) 19. Guadalupe owns 2 rectangular tracts of land. One is
300 m by 500 m and the other is 250 m by 630 m.
The combined area of these 2 tracts is how many
square meters?
(Al
(Bl
(Cl
(D)
3,360
307,500
621,500
704,000
(El 2,816,000
(A)
(Bl
(C)
(D)
(El
l-37了1
38
l
Geometry
The area of a rectangle can be found by
multiplying the length and width of the
rectangle. Therefore, the combined area, in square
meters, of the 2 rectangular tracts of land is
( 300 )( 500 ) + (25 0 )( 630 ) = 1 50 , 000 + 157 , 500 =
307,500.
Th e correct answer 1s B.
PS 039! 8
- There are five sales agents in a certain real estate
office. One month Andy sold twice as many properties
as Ellen, Bob sold 3 more than Ellen, Cary sold twice as
many as Bob, and (^) Dora sold as many as Bob and Ellen
together. Who sold the most properties that month?
(A) Andy
(B) Bob
(C) Cary
(D) Dora
(E) Ellen