SAT Mc Graw Hill 2011

306 MCGRAW-HILL’S SAT

SAT Practice 2: Systems

6. If and , then which of the

following expresses min terms of y?

(A)

(B)

(C)

(D)

(E)

7. 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


8. 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

9. 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

1. 
   

   If 3x+ 2 y=72 and y= 3 x,then x= (^6) = 3
   (A) 6
   (B) 7
   (C) 8
   (D) 9
   (E) 10

   
   


2. 
   

   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

   
   


3. 
   

   If 4m− 7 n=10 and 2m+ 2 n=4, what is the value
   of 2m− 9 n?

   
   


4. 
   

   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)

5. 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