Precalc Solve Systems/Matrices

Steffen graphed two lines in order to find the solution to a given system of equations.
What is the solution?

• (-3,-8)
• (-8,-3)
• (3,-8)
• (8,3)

How many solutions will this system have? 

• No solution
• One Solution
• I Don't Know
• Infinitely Many Solutions

When you graph the exact same equation twice,

• you will have no solution. 
• you will have one solution.
• you will have infinite solutions. 
• you will graph a giraffe. 

Which of these 4 matrices is in the correct form for a solution?

• Top Right

• Top Left

• Bottom Left

• Bottom Right

David is running a concession stand at a soccer game. He sells nachos and sodas. Nachos cost $1.50 each and sodas cost $0.50 each. At the end of the game, David made a total of $78.50 and sold a total of 87 nachos and sodas combined. Which system of equations represents this situation?

• 1.5x+0.5y=78.5
  x+y=87
• 1.5x+0.5y=78.5
  1.5x+0.5y=87
• x+y=78.5
  1.5x+0.5y=87
• x+y=78.5
  x+y=87

Tags

CCSS.HSA.CED.A.3

What is a₃₁ for the given matrix?

• -4
• 4
• 6
• 2

The augmented matrix shown indicates a __________ system

• one solution

• infinite solutions

• no solution

Tags

CCSS.8.EE.C.8B

The order that you multiply matrices is important. (Changing the order produces a different answer).

• True

• False

Subtract

• -9

  -8

  3

  10

• -9

  8

  3

  2

• 5

  -8

  3

  10

• -5

  8

  3

  2

Add

• 11 8

  -4 2

• 3 2

  -6 -6

• 11 8

  -4 -6

• 11 8

  -6 2