Analyze Systems of Equations

4x+8y=20
-4x+2y=-30

• (-7,1)

• (2,-5)

• (-2,5)

• (7,-1)

The solution is:

• (4, 3)

• (3, 4)

• (-4, 3)

• No solution

What is the solution?

• No solution

• (0, 2)

• (0, -4)

• (3, -3)

What is the solution?

• (6, 3)

• (3, 6)

• (-6, 3)

• No solution

What is the solution?

• (1, -1)

• (-1, 1)

• (0, -2)

• (0, 1)

What would be a good reason for solving a system using substitution?

• Both equations are in slope-intercept form

• A variable is defined

• There is a set of opposite terms for either x or y

What would be a good reason for solving a system using graphing?

• A variable is defined

• Both equations are in slope-intercept form

• There is a set of opposite terms for either x or y

What would be a good reason or reasons (there could be two answers) for solving a system using elimination?

• A variable is defined

• Both equations are in slope-intercept form

• There is a set of opposite terms for either x or y

• There is a set of same terms for either x or y

• Substitution

• Graphing 

• Elimination 

• Substitution

• Graphing

• Elimination