SAT Mc Graw Hill 2011

250 MCGRAW-HILL’S SAT

SAT Practice 4:SimplifyingProblems

1. If 3y− 4 z= 6 and 2y+z= 10, then y− 5 z=
   (A) 12
   (B) 6
   (C) 4
   (D) 0
   (E) − 4


2. If a+ b= 3, a+ c= 5, and b+ c= −6, then
   a+ b+ c=
   (A) 4
   (B) 2
   (C) 1
   (D) 0
   (E) − 1


3. If and , what is the

value of?

(A)

(B)

(C)

(D) 2

(E) 8

5

3

3

5

1

2

b

c

ac

c

+

= 5

ab

b

+

= 3

Questions 4 and 5 pertain to the following

definition:

For all non-zero real numbers k,let.

4. Which of the following is equivalent to
   ^3 −^2?

(A)

(B)

(C) ^1

(D)

(E) ^2

5. Other than 0, what is the only value of kfor
   which ^^kis undefined?

^

6

5

∧^5

6

∧^1

6

∧k=−

k

1

1

....

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