| |
| |
1. |
Use Cramer's rule to find the value of x in the system of equations. 
|
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
|
| |
|
Hint |
|
| |
2. |
Use Cramer's rule to solve the system of equations. 
|
| |
|
A. |
(-0.4, -0.2) |
B. |
(0.011, 0.0055) |
| |
|
C. |
(0.2, 0.4) |
D. |
(0.4, 0.2) |
| |
|
Hint |
|
| |
3. |
Solve the system –2x – 4y = 7, 3x + 5y = 9. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
(71, –39) |
| |
|
Hint |
|
| |
4. |
Which of the following cannot be true concerning Cramer's Rule for two variables? |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
5. |
Which method of finding solutions would work best to find the solutions to the system 12.4x – 3.66y = 12.19, 3.9x + 6.17y = 19.28, and why? |
| |
|
A. |
elimination, because 6.17 is a factor of 3.66 |
| |
|
B. |
Cramer's Rule, because there are fewer calculations. |
| |
|
C. |
Cramer's Rule, because none of the other methods will correctly solve the problem |
| |
|
D. |
elimination, because Cramer's Rule doesn't apply to this problem |
| |
|
Hint |
|
|
|