Elimination Method

Elimination Method

Open Ended

Do you have any good things to share? If so, what is your good thing? [Mine is that I got my new glasses yesterday!]

Poll

How are you feeling today?

• Happy

• Sad

• Mad

• Tired

Poll

This week, I've mainly been...

• happy.

• sad.

• lonely.

• frustrated.

Poll

The color that makes me smile MOST is...

• Blue

• Yellow

• Orange

• Pink

• Purple

​Here is a situation...

​The perimeter of a triangle is 31cm. Sides #1 and Sides #2 have equal length,

while Side #3 is one centimeter shorter than twice the length of Side #1.

​

Lets determine how long each side is. ​

Open Ended

Let x represent the length of Side #1. What essential part of this let statement is missing? What is the length of Side #2? Side #3?

Open Ended

Write a mathematical sentence that states that the perimeter is 31cm.

Open Ended

Solve the equation you found and determine the length of each side.

Elimination Method part 1

Open Ended

When is the best time to graph a system of equations?

Open Ended

When are the three times where the elimination method is better?

Multiple Choice

The solution (answer) to a system of equations is ____________

• the point where the 2 lines intersect

• the graph of a line

• only finding what x = __

Multiple Choice

Solve the system by elimination.

−4x − 4y = 0

4x + 4y = 0

• (−6, −4)

• Infinite number of solutions

• No Solution

• (6, 4)

• (0,0)

Multiple Choice

Solve using Elimination Method:

4x+ 9y = 28

-4x -y = -28

• (-7,0)

• (6,0)

• (-6,0)

• (7,0)

• (6,7)

Open Ended

What is one thing that you learned today in class?