System Of Linear Equations
7 Questions
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Solving a system of linear equations with two variables by methods of substitution and elimination and graphically.
Questions and Answers
- 1.When solving system of equations , which expression could be substituted for r in the second equation? r = 4 - s3r + 2s = 15
- A.
4 - s
- B.
4 - r
- C.
S - 4.
- D.
4/s
- 2.Use elimination to solve the system of equations.x + 6y = 10x + 5y = 9
- A.
(1,4)
- B.
(4,1)
- C.
(-1, -4)
- D.
(-4, -1)
- 3.Use substitution to solve the system of equationsn = 3m - 112m + 3n = 0
- A.
(-2, 3)
- B.
(-3, 2)
- C.
(3, -2)
- D.
(2, -3)
- 4.Solve the system of equations.Use the video clip as a guide to apply the method of elimination by addition.6x - 7y = 213x + 7y = 6
- A.
(-3, 3/7)
- B.
(3, -3/7)
- C.
(7/3, -3)
- D.
(-3, -7/3)
- 5.
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- A.
(3, 1)
- B.
(1, 3)
- C.
(-2,1)
- D.
(-3, -1)
- 6.To eliminate the variable y in the system of equations, multiply the second equation by which number?6x + 4y = 222x - y = 1
- A.
3
- B.
9
- C.
22
- D.
4
- 7.The length of a rectangle is three times the width. The sum of the length and the width is 24 inches. What is the length of the rectangle?
- A.
3 inches
- B.
6 inches
- C.
9 inches
- D.
18 inches
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