| |
| |
1. |
What is the first step in solving the system of equations using the elimination method? 
|
| |
|
A. |
Multiply the second equation by 2. |
| |
|
B. |
Add the equations. |
| |
|
C. |
Subtract the second equation from the first equation. |
| |
|
D. |
Solve the first equation for x. |
| |
|
Hint |
|
| |
2. |
Solve the system of equations by using the elimination method. 
|
| |
|
A. |
(4, 2) |
B. |
(12, -2) |
| |
|
C. |
(2, 3) |
D. |
(34, -13) |
| |
|
Hint |
|
| |
3. |
The equations y = -0.38x + 56.6 and y = 0.38x + 43.4 represent the percent of men and women, respectively, receiving bachelor's degrees, where x is the number of years since 1968. In approximately what year did the same percent of men and women receive bachelor's degrees? |
| |
|
A. |
1990 |
B. |
1980 |
| |
|
C. |
1985 |
D. |
1995 |
| |
|
Hint |
|
| |
4. |
Solve the system of equations. –2x + 3y = 7
4x – 6y = 8. |
| |
|
A. |
y = –22, x = 29.5 |
B. |
y = –22, x = –31 |
| |
|
C. |
no solution |
D. |
y = –22, x = –36.5 |
| |
|
Hint |
|
| |
5. |
Solve the system of equations 3x – 5y = 4
–2x + 4y = 3. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
|
|