Algebra Unit 2 Review

When should the substitution method be used to solve a system of equations?

• When one equation can be solved for one variable in terms of the other variable.

• When the system of equations has exactly one solution.

• When the system of equations has infinitely many solutions.

• When the system of equations has no solution.

What is the substitution method for solving a system of equations?

• The substitution method for solving a system of equations involves graphing the equations and finding their intersection point.

• The substitution method for solving a system of equations involves solving both equations simultaneously.

• The substitution method for solving a system of equations involves multiplying both equations by the same constant and then adding them together.

• The substitution method for solving a system of equations involves solving one equation for one variable and then substituting that expression into the other equation.

When should the elimination method be used to solve a system of equations?

• When the coefficients of one variable in both equations are the same.

• When the coefficients of one variable in both equations are additive inverses of each other.

• When the coefficients of one variable in both equations are positive.

• When the coefficients of one variable in both equations are equal to zero.

Which method would be most efficient: 2x + 3y = 8 y = -2x +5

• substitution

• equal values

• elimination

• substitution

• elimination

• equal values

y = 2x + 5 and y = 2x - 3

• 1 solution

• no solution

• infinitely many solutions

y = -x + 2 and y = -x + 2

• solution

• no solutions

• infinitely many solutions

Which color is the solution region to this system of inequaliteis?

• White

• Blue

• Purple

• Red

What is the slope-intercept form of a line?

• Ax + By = C

• y = mx + b

• y - y1 = m(x - x1)

• y = Ax + By

What does "b" represent in y=mx+b?

• y-intercept

• slope

• the origin

• x-intercept