6-2 Solving Systems by Substitution

6-2 Solving Systems by Substitution

Guided Notes

Multiple Choice

• (1, -4)

• (1, 4)

• (-4, -7)

• (-7, -4)

Multiple Choice

Solve the following system:

 $y=-2$  

 $4x-3y=18$  

•  $\left(3,\ -2\right)$  

•  $\left(3,\ 2\right)$  

•  $\left(-2,3\right)$  

•  $\left(2,\ 3\right)$  

Multiple Choice

• (-8, -5)

• No Solution

• Infinite number of solutions

• (-8, 5)

Multiple Choice

• (3, -6)

• (3, -8)

• Infinite number of solutions

• (3, 6)

Multiple Choice

Which answer has a correct first step for this system:

3x + 3y = 3

y = 3x + 5

• The variable is already isolated, so we've already solved the system.

• The variable is already isolated for y, so we substitute it in the first equation and solve for x

  3x + 3(3x + 5) = 3

• Free sha vaca doo

• The variable is already isolated for y, so we substitute it in the second equation and solve for x

  y = 3(3x + 3y) = 3

Multiple Choice

How many solutions does the graph have?

• One solution

• No solution

• Infinite solutions

Multiple Choice

How many solutions does the graph have?

• One solution

• No solution

• Infinite solutions