System of Linear Equations

6x - 4y = -16

10x - y = 13

• (2,7)

• (1,-3)

• (4,2)

• (2,-1)

7x - 14y = 7

5x - 5y = 15

• (4,3)

• (1,-2)

• (5,2)

• (3,1)

5x + 10y = -35

2x - 12y = 34

• (-5,-2)

• (-1,-3)

• (5,1)

• (3,-5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

10x - y = 15

12x + 3y = 39

• (3,1)

• (1,-5)

• (2,5)

• (4,-3)

x + 3y - 12 = 0

x = 12y - 18

• (6,2)

• (18,3)

• (3,3)

• (-6,1)

x + 6y = 46

x + y - 16 = 0

• (4,12)

• (6,10)

• (16,5)

• (10,6)

2x + y = 0

2x + y = 3

• (4,-5)

• (1,-2)

• (1,2)

• No Solution

Which one is true.

• Intersecting lines has two solutions.

• Connecting lines has one solution.

• Intersecting lines has infinitely many solutions.

• Parallel lines has no solution.

There are red cubes and yellow cubes, and they are different weight. We will use the weighing scale and unit g for grams. The first one is 2 red cubes and 3 yellow cubes, the total weight is 18g. The second one is 1 red cube and 7 yellow cubes, the total weight is 31g. What is the weight for both cubes?

• 1 red cube = 5g

  1 yellow cube = 2g

• 1 red cube = 3g

  1 yellow cube = 4g

• 1 red cube = 6g

  1 yellow cube = 1g

• 1 red cube = 2g

  1 yellow cube = 5g

Tags

CCSS.8.EE.C.8C

Tony sell chicken and fries for 2 days at the store. We will use the dollar sign. At first day, he sells 5 chicken and 6 fries and he earns $27. At the second day, the price of both foods are same. He sells 7 chicken and 4 fries and he earns $29. What is the cost for chicken and fries?

• Chicken = $2

  Fries = $3

• Chicken = $3

  Fries = $2

• Chicken = $1

  Fries = $5.50 (or $11/2)

• Chicken = $5.50 (or $11/2)

  Fries = $1