Elimination Method Quiz

What is the first step in the elimination method?

• Multiply the equations by any number.

• Subtract one equation from the other.

• Align the variables and constants vertically.

• Add the equations directly.

Why do we multiply equations by certain numbers in the elimination method?

• To make the equations longer.

• To make the coefficients of one variable add up to zero.

• To make the equations more complex.

• To change the variables completely.

What happens when the coefficients of a variable add up to zero?

• The variable is unchanged.

• The variable doubles.

• The variable becomes negative.

• The variable is eliminated.

After eliminating one variable, what is the next step?

• Solve for the remaining variable.

• Add more variables.

• Start over with a new set of equations.

• Multiply the equations again.

In the first example, what is the solution point found?

• (-3, 1/2)

• (3, -1/2)

• (1/2, -3)

• (-1/2, 3)

In the second example, which variable is suggested to be eliminated first?

• Neither

• y

• x

• Both x and y

What is the common multiple used to eliminate the y variable in the second example?

• 10

• 15

• 20

• 5

What is the final solution point in the second example?

• (8, -1)

• (-8, 1)

• (1, -8)

• (-1, 8)

What is the purpose of using 'laser beams' in the explanation?

• To make the process more complex.

• To change the variables.

• To confuse the students.

• To add humor and emphasize elimination.

What is the result when negative 15y and positive 15y are combined?

• 0

• 15y

• -30y

• 30y