Identify the rows and columns
Adding and subtracting matrices
scalar multiplication of matrices
multiplying 2x2 matrices
matrix word problems
100

[ 4  5  6  7  8  9 ]

[ 6  9  3  5  1  1 ]

rows 2 columns 6

100

[ -1  -4 ]       [ 0  1 ]

              __

[ 1  2 ]          [ 4  2 ]

[ -1  -5 ]

[ -3  0 ]

100

    [1 -1 0]

-2 [6 3  1]

    [3 2  9]

[-2   2   0]

[-12 -6 -2] 

[-6 -4 -18]

100

[6  -3]             [0  -2]

[-2  -6]     *     [-6  -5]


[-18  3]

[36  34]

100

The school that Julia goes to is selling tickets to the annual talent show. On the first day of ticket sales, the school sold 14 adult tickets, and 13 student tickets for a total of $288. The school took in %159 on the second day of selling 7 adult tickets a 9 student tickets. Find the price of an adult ticket and the price of a student ticket.

Adult $15, and student $6

200

[ 10  5  9  8  4  3 ]

[ 11  4  0  9  5  6 ]

[ 12  9  8  4  6  6 ]

rows 3 columns 6

200

[ -3  -5 ]        [ 1  -3]

              +          

[ 3  3 ]          [ -5  -5 ]

[ -2  -8 ]

[ -2  -2 ]

200

    [-6 1]

-3 [4 -6]

    [-5 2]

[18  -3]

[-12  18]

[15  -6]

200

[3  4]          [-6  3]

-5  4]    *    [6   1]

[-6  13]

[54  -11]

200

Gabriella and Sara each improved their yards by planting hostas and shrubs. They bought their supplies from their supplies from the same store. Gabriella spent $34 on 6 hostas ans 2 shrubs. Sara spent $86 on 4 hostas and 14 shrubs. What is the cost of of one hosta and the cost of one shrub

Hosta is $4, and Shrub is $5

300

[ 20  4  8  2  4 ]

[ 11  2  9  8  0 ]

rows 2 columns 5

300

[ 1  -1  -2 ]            [ -6  -6  4 ]

                   __

[ -6  6  -1 ]            [ -6  4  1 ]

[ 7  5  -6 ]

[ 0  2  -2 ]

300

-2    [-2  -2  -5  5]

[4  4  10  -10]

300

[-1  3]        [-6  5]

[5   3]    *   [5   0]

[21  -5]

[-15 25]

300

the school that Scott goes to is selling tickets to a spring musical. On the first day of ticket sales the school sold 4 senior citizen tickets and 6 child tickets for a total of $72. The school took in $156 on the second day by selling 12 senior citizen tickets and 12 child tickets. Find the price of a senior citizen ticket and the price of a child ticket.

[3/10]

400

[ 4  6 ]

[ 9  2 ]

[ 0  1 ]

rows 3 columns 2

400

[ 6  3  -3 ]     +    [ -5  6  1 ]

[ 1  9  -4 ]

400

2  [6  -2  0  -6]

   [-3  6  -12  3]

[12  -4  0  -12]

[-6  12  -12  6]

400

[-6  4]         [2  1]

-1  -3]    *   [-2 -4]

[-20  -22]

[4  11]

400

Micaele and Molly each improved their yards by planting hostas and ivy. they bought their supplies from the same store. Micaela spent $86 on 9 hostas and 7 pots of ivy Molly spent $108 on 10 hostas and 14 pots of ivy. what is the cost of one hosta and the cost of one pot of ivy.

hotsa $8 and pot of ivy $2

500

[ 2  6  9  3 ]

[ 0  1  6  2 ]

rows 2 columns 4

500

[ 0 ]            [ -3 ]              [ 0 ]

[ 3 ]            [ 6 ]               [ 1 ]

          __                 __

[ 2 ]           [ -6 ]               [ 0 ]

[ 0 ]           [ -5 ]               [ 3 ]

[ 3 ]

[ -4 ]

[ 8 ]

[ 2 ]

500

2  [5  -3]     -3     [3  4]

    [0  -6]             [-1  7]

[1  -18]

[3  -33]

500

[3  2]         [-6  3]

[6  5]    *   [-4  3]

[7  -3]

[10  -3]

500

Natalie and jaidee are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. Natalie sold 3 small boxes of grapefruit and 4 large boxes of grapefruit for a total of $93. Jaidee sold 11 small boxes of grapefruit and one large box of grapefruit for a total of $95. find the cost of one small box of grapefruit and one large box of grapefruit.

small box $7 and large box $18