Matrix Word Problems

Select the correct matrix

• A

• B

• C

Select the correct matrix

• A

• B

• C

Select the correct matrix

• A

• B

• C

Select the correct matrix

• A

• B

• C

Solve for matrix Y.

• -4    9
  -11    9

• 4   -8
  11   8

• 4   -9
  11   9

• -4   9
  11   -9

Select the correct matrix

• A

• B

• C

Select the correct matrix.

• A

• B

• C

Solve the system of equations: 

• ( 4, 0, -2)

• ( -4, -2, 0)

• None of these

• ( -4, 0, -2)

Homer sells tickets for admission to your school play and collects a total of $104. Admission prices are $6 for adults and $4 for children. He sold 21 tickets total. Solve the system using matrices:

x + y = 21

6x + 4y = 104

• (10, 11)

• (12, 9)

• (11, 10)

• (9, 12)

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. Using matrices, what would be your solution as to how many nachos and soda he sold?

• (35, 52)

• (18, 69)

• ( 52, 35)

• (61, 26)