| |
| |
1. |
A best-fit line is drawn on a scatter plot showing the average daily temperature and the number of people at a public swimming pool. The slope of the line would probably be ________ |
| |
|
A. |
negative. |
B. |
undefined. |
| |
|
C. |
positive. |
D. |
zero. |
| |
|
Hint |
|
| |
2. |
Choose the graph of f(x) = |x| - 2. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
3. |
The solution of a system of three linear equations in three variables, x, y, and z, is called a(n) ____ (x, y, z). |
| |
|
A. |
ordered triple |
B. |
ordered pair |
| |
|
C. |
integer |
D. |
sum |
| |
|
Hint |
|
| |
4. |
Find the coordinates of the foci of an ellipse with equation  |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
5. |
Find  if g(x) = x - 5 and h(x) = |x|. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
6. |
Simplify  |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
7. |
Solve logb 36 = 2 |
| |
|
A. |
18 |
B. |
6 |
| |
|
C. |
-6 |
D. |
-6, 6 |
| |
|
Hint |
|
| |
8. |
Solve log3 (x + 4) - log3 (x - 2) = 2 log3 2. |
| |
|
A. |
6 |
B. |
9 |
| |
|
C. |
4 |
D. |
8 |
| |
|
Hint |
|
| |
9. |
Write the first four terms of the geometric sequence in which a1 = -3 and r = -4. |
| |
|
A. |
–3, -12, -48, -192 |
B. |
3, 12, 48, 192 |
| |
|
C. |
-3, 12, -48, 192 |
D. |
3, -12, 48, -192 |
| |
|
Hint |
|
| |
10. |
The table shows the average heights (in centimeters) of females ages 1-14. If this trend continues, about how tall will an average fifteen-year-old female be? |
| |
|
 |
| |
|
A. |
163.7 cm |
B. |
160.3 cm |
| |
|
C. |
156.9 cm |
D. |
168.5 cm |
| |
|
Hint |
|
| |
11. |
Choose the ordered pair that satisfies 7x – 15y < -13. |
| |
|
A. |
(2, -3) |
B. |
(1, 1) |
| |
|
C. |
(-2, 0) |
D. |
(0, -2) |
| |
|
Hint |
|
| |
12. |
If  and  find 4A – 5B. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
13. |
In order for a matrix to have an inverse, what must be true? |
| |
|
A. |
ad – bc = 1 |
B. |
ad – bc  0 |
| |
|
C. |
ad – bc = 0 |
D. |
ad – bc 1 |
| |
|
Hint |
|
| |
14. |
Simplify:  if  |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
Cannot be simplified further. |
| |
|
Hint |
|
| |
15. |
When is it true that  ? |
| |
|
A. |
 |
B. |
-1 |
| |
|
C. |
 |
D. |
all real numbers |
| |
|
Hint |
|
| |
16. |
What type of function is y = 2? |
| |
|
A. |
absolute value |
B. |
constant |
| |
|
C. |
rational |
D. |
direct variation |
| |
|
Hint |
|
| |
17. |
Suppose that the wealth of a business owner is increasing exponentially. In 1993, he had $40 million. In 2001, he had $55 million. How much money will he have in 2010? |
| |
|
A. |
$78.7 million |
B. |
$57.2 million |
| |
|
C. |
$20.3 million |
D. |
$28.0 million |
| |
|
Hint |
|
| |
18. |
Solve 4 – 2e4x = 1. |
| |
|
A. |
–0.41 |
B. |
0.41 |
| |
|
C. |
0.10 |
D. |
–0.10 |
| |
|
Hint |
|
| |
19. |
Find a1 in a geometric series for which S12 = 3071.25 and r = 2. |
| |
|
A. |
 |
B. |
3 |
| |
|
C. |
 |
D. |
|
| |
|
Hint |
|
| |
20. |
What is the value of r in an infinite geometric series if a1 = 3 and the sum is 6? |
| |
|
A. |
|
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
|
|