Test Review of Matrix Application

Which matrix shows the inventory of sweatshirts remaining after the B-Day sales?

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Algebra High cheerleaders are selling sweatshirts for the Football Team. The inventory of sweatshirts as well as sweatshirts sold on A-Days and B-Days are given in the matrices. Which matrix shows the total of sweatshirts sold in each category, color/size, by the cheerleaders?

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Which matrix shows the inventory of sweatshirts remaining after the A-Day sales?

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Which matrix shows the inventory of sweatshirts remaining after both A-Day & B-Day sales?

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What do w, x, y and z equal in this matrix equation?

• w = 13, x = 4, y = 7, z = 23

• w = 13, x = -4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 17

Find 3B - 2A

• [22 25]

  [17 3]

• [14 5]

  [-11 3]

• [-14 5]

  [11 -3]

• none of these

Find 2A-3B

• -3 1

  7 -1

• 1 0

  1 -4

• -4 0

  6 -1

• -14 -5

  11 -3

Find 2B-5A

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How many black sweatshirts were sold in total by both A-Day & B-Day cheerleaders?

• 113

• 45

• 68

• Can't Be Determined.