306 MCGRAW-HILL’S SAT
SAT Practice 2: Systems
- If and , then which of the
following expresses min terms of y?
(A)
(B)
(C)
(D)
(E)
- The sum of two numbers is 5 and their difference
is 2. Which of the following could be the differ-
ence of their squares?
(A) − 17
(B) − 3
(C) 3
(D) 10
(E) 21 - If 7x+ 2 y− 6 z=12, and if x, y,and zare pos-
itive, then what is the value of
(A) 1/12
(B) 1/6
(C) 1/4
(D) 5/12
(E) 7/12
- If and , then
(A) (B) (C)
(D) (E)^9
35
17
70
8
35
9
70
2
35
a
c
=
4
3
1
7
b
c
=
a
2 b
3
5
=
2
72
+
+
z
xy
?
18
6
−y^3
y
2
y
y
2
y^3
18
18
y^3
m
5 y^2
6
m =
y
If 3x+ 2 y=72 and y= 3 x,then x= (^6) = 3
(A) 6
(B) 7
(C) 8
(D) 9
(E) 10
The difference of two numbers is 4 and their sum
is −7. What is their product?
(A) −33.0
(B) −28.0
(C) −10.25
(D) 8.25
(E) 10.5
If 4m− 7 n=10 and 2m+ 2 n=4, what is the value
of 2m− 9 n?
If 9p= 3 a+1 and 7p= 2 a−3, then which of the
following expresses pin terms of a?
(A) (B) (C)
(D) (E)
- The cost of one hamburger and two large sodas is
$5.40. The cost of three hamburgers and one large
soda is $8.70. What is the cost of one hamburger?
(A) $1.50 (B) $1.95 (C) $2.40
(D) $2.50 (E) $2.75
a+ 4
2
7
9
a
2
63
23 a
9
31 a−
7
a+
....
1 2 3 4 5 7 8 9
6
1
0 2 3 4 5 7 8 9
6
1
0 2 3 4 5 7 8 9
6
1
0 2 3 4 5 7 8 9
6