Review Problems

2. If x = 3 − y² and y = −2, what is the value of x ?

   1. −2
   2. −1
   3. 1
   4. 2

3. For all x, 2^x + 2^x + 2^x + 2^x =

   1. 2^{(x + 2)}
   2. 2^{(x + 4)}
   3. 2^3x
   4. 2^4x

4. For all

   1. 
   2. 
   3. 
   4. 

5. When 3x³ − 7x + 7 is divided by x + 2, the remainder is:

   1. −5
   2. −3
   3. 1
   4. 3

6. If then x =

   1. −0.969
   2. −0.875
   3. 0
   4. 0.875

7. If then x =

   1. 0.4
   2. 1.4
   3. 2.8
   4. 3.4

8. If (3^x2)(9^x)(3) = 27 and x > 0, what is the value of x?

   1. 0.27
   2. 0.41
   3. 0.73
   4. 1.41

9. If y ≠ 4a and what is the value of y in terms of a and x?

   1. 
   2. 
   3. 
   4. 

10. If 4x + ky = 15 and x − ky = −25, which of the following could be the values of x and y?

    1. x = −3 and y = −5
    2. x = −2 and y = 3
    3. x = 0 and y = −2
    4. x = 2 and y = 3

11. How many integers are in the solution set of |4x + 3| < 8?

    1. None
    2. Two
    3. Three
    4. Four