| |
| |
1. |
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 pair |
B. |
ordered triple |
| |
|
C. |
integer |
D. |
sum |
| |
|
Hint |
|
| |
2. |
Solve the system of equations. 
|
| |
|
A. |
(7, -2, 1) |
B. |
(1, -4, 6) |
| |
|
C. |
(13, 0, -4) |
D. |
(10, -1, 11) |
| |
|
Hint |
|
| |
3. |
Solve the system of equations. 
|
| |
|
A. |
no solution |
B. |
(0, -2, 7) |
| |
|
C. |
(1, 1, 2) |
D. |
infinite number of solutions |
| |
|
Hint |
|
| |
4. |
Solve the system 4y – 6x + 8z = 13, 10y – 15x + 20z = 6, y – 5x + 2z = 5. |
| |
|
A. |
(-3, 1, 7) |
B. |
 |
| |
|
C. |
no solution |
D. |
infinite solutions |
| |
|
Hint |
|
| |
5. |
What is true about a system of equations in three variables that has 1 solution? |
| |
|
A. |
planes intersect in one point |
B. |
planes intersect in one line |
| |
|
C. |
planes have no points in common |
D. |
planes intersect in the same plane |
| |
|
Hint |
|
|
|