Matrix and Word Problems

What is A^-1?

• 
• 
• 
• 

Solve the matrix equation using inverse equations.

• A

• B

• C

• D

Solve the matrix equation using inverse equations.

• A

• B

• C

• D

Find what m = ?

• -3

• 0

• 4

• 6

Find what z equals.

• -6

• -5

• -3

• 2

Solve the system using matrices
x + 2y = 2
5x - 6y = - 54

• (-6, 4)

• (-8, 4)

• (8, 4)

• (6, 4)

Solve the system using matrices
x + 7y = - 21
9x + 7y = 35

• (7, -4)

• (-4, 7)

• (7, 4)

• (-4, -7)

Solve the system using matrices
3x - 8x = 32
x + y = 7

• (-8, 1)

• (8, -1)

• (-1,8)

• (1, -8)

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)

On the first night, the Movie House Theater sold 7 adult tickets and 11 child tickets for $227. On the second night they took in $150 by selling 6 adult tickets and 6 child tickets. Find the price of an adult ticket and the price of a child ticket using matrices on your calculator.

• Adult $13

  Child $5

• Adult $10

  Child $6

• Adult $8

  Child $16

• Adult $12

  Child $13