1. Solve the system of two equations using substitution.

Question

y = 2 + 3x.

4x − 3y = −16.

Responses:
A. (2, 10).
B. (2, 8).
C. (−2, 4).
D. (−2, -4).

2. Solve the system of equations.

2x + 6y = −18.

x = 5y − 1.

Responses:
A. (−7.25, −1.25).
B. (−6, −1).
C. (4, 1).
D. (5.25, 1.25).

3. Solve the system of equations.

3x + y = 2.

7x − 4y = 30.

Responses:
A. (2, −2).
B. (1/2, 1/2).
C. (−2, 8).
D. (2, −4).

4. Solve the system of equations.

−4x + 6y = 38.

x − 5y = −20.

Responses:
A. (−35, −3).
B. (35, −3).
C. (5, 3).
D. (−5, 3).

5. How many solution(s) does the system of equations have?

−5x + y = −18.

10x − 2y = 36.

Responses:
A. None.
B. One.
C. Infinite.
D. Two.

Answer the questions by A or B or C or D.

Answer 1

1. B. (2, 8).
2. C. (4, 1).
3. D. (2, -4).
4. B. (35, -3).
5. B. One.