Unit 3 Extra Credit Assignment

Which of the following is a possible solution(s) for a system of linear equations

• 1 solution

• infinite solutions

• no solutions

• all of the above

Which of the following is a method of solving a system of linear equations?

• Graphing

• Elimination

• Substitution

• Matrix

• All of the above

What is the solution for the following system of linear equations?

• (3, 1)

• (2, 4)

• (1, 3)

• no solution

• infinite solutions

What is the solution(s) for the following system of linear equations?

• (1, 1)

• (0, 3)

• (2, 0)

• no solution

• infinite solutions

What is the solution(s) for the following system of linear equations?

• (3/2, 0)

• (1 , 1)

• (0, -3)

• no solution

• infinite solutions

• 2(24 + 6y) - 8y = -3

• 2(24 - 6y) - 8y = -3

• 2x - 8(x - 6y) = -3

• 3x - 14y = 21

• (-4, -6)

• (6, -2)

• (3, -4)

• (-5, 2)

• (-6, 2)

• x because it has the opposite coefficients.

• x because it comes first in both equations.

• y because it comes second in both equations.

• y because it has opposite coefficients.

• y because it is already by itself in the first equation.

To eliminate x, how would you change the equations below?

-2x + 6y = -9

-6x - 7y = 12

• Multiply the first equation by -4

• Multiply the first equation by -3

• Multiply the second equation by -2

• Multiply the second equation by 4

• Multiply the second equation by 3

Solve the system of linear equation by elimination (you will have to show work on the test).

5x + 6y = 50

x - 6y = -26

(notice the y have the same number and opposite signs)

• (-4, 2)

• (2, 4)

• (-4, 5)

• (4, 5)

• (2, 5)