12/10 warm up fom

Before you begin:

Remember to LOOK FOR THE VARIABLES THAT WILL ELIMINATE TO EQUAL ZERO.

1. Line them up and look for the zero pair. If you need to, MULTIPLY to make a zero pair.

2. 2. ADD the equations.

3. 3. SOLVE for the variable. (find x= or y=)

4. 4, Find the OTHER variable. Substitute the x= or y= you found in step #3.

"TYPE YES" when you have read the steps.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the best first step to solve this system by elimination?

• Add the equations to eliminate y

• Subtract the equations to eliminate y

• Multiply the second equation by 3.

• Multiply the first equation by 2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

The solution to a system of linear equations is ALWAYS...

• a fraction

• an ordered pair

• a decimal

• a negative number

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of linear equations
-2x - 10y = 22
2x + 5y = -12

• (-2, -1)
• (-4, -2)
• (4, -2)
• (-1, -2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which variable do you add to ELIMINATE (equal zero)?

• the x variables will equal zero

• the y variables will equal zero

• the numbers without variables will equal zero

• What's a variable?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination
-6x + 5y = 1
6x + 4y = -10

• (1,-1)
• (0,-1)
• (1,1)
• (-1,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Let's multiply the top equation by -2. What would be our new equation?

2x + 3y = 12

4x - 7y = - 54

• 4x - 6y = -24

• -4x - 6y = 12

• -4x - 6y = 24

• -4x - 6y = -24

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

what do you need to multiply the top equation by to make a zero pair:

5x - 2y = 11

-10x + 3y = -4

• 5

• -1

• 2

• -2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6