Solving Systems by Matrix

Solving Systems:
Solve for x and y
3x + 2y = 16
7x + y = 19

• (-2,5)
• (-2,-5)
• (2,-5)
• (2,5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Systems of 3 Equations:
-x+6y-z=6
2x+y-3z=16
-x+5y+3z=-7

• A (0, -6, 0)
• B (0, 0, -6)
• C (3, 1, -3)
• D (-6, 4, -3)

Tags

CCSS.HSA.REI.C.6

solve for x and y
5x + 3y = 7
y = 4

• (4,1)
• (4,-1)
• (1,4)
• (-1,4)

Tags

CCSS.HSA.REI.C.9

-9y=-25+2x

-4x-9y=-23

• (-1,3)

• (3,-1)

• (0,0)

• (-3, -1)

Solve the following system using substitution.

• (15, 120, 45)

• (120, 15, 45)

• (15, -15, 0)

• (-15, 15, 0)

Rachel buys 3 tricycles and 4 bicycles for a total of $72. Joe bought 5 tricycles and 2 bicycles for $50.  Which system models this scenario?

• 3B + 4T = 72
  2T + 5B = 50
• 3T + 4B = 72
  5T + 2B = 50
• 3T + 4B = 50
  5T + 2B = 72

Tags

CCSS.HSA.CED.A.3

Ralph makes $14 per hour plus a $20 stipend.  Melissa makes $12 per hour plus a $15 stipend.  Which system models this scenario?

• y = 14x + 15
  y = 12x + 20
• y = 20x + 14
  y = 15x + 12
• y = 14x + 20
  y = 12x + 15

Tags

CCSS.8.EE.C.8C

Jon has a total of 25 quarters and dimes.  The amount of money he has is $5.65.  Which system models this scenario?

• Q + D = 25
  .25Q + .10D = 5.65
• Q + D = 5.65
  .25Q + .10D = 25
• .25Q + .10D = 25
  Q + D = 5.65

Tags

CCSS.8.EE.C.8C