Harith, Hakim and Hammam went to DAISO to purchase supplies for making decorations for the upcoming event at the school. Harith purchased three sheets of craft paper, four boxes of markers and five glue sticks. His bill, was RM23. Hakim spent RM30 when he bought six sheets of craft paper, five boxes of markers and two glue sticks. Hammam, purchases totaled RM13 when he bought three sheets of craft paper, two boxes of markers and one glue stick. Determine the unit cost of each item. Let p represent the number of sheets of craft paper. Let q represent the number of boxes of markers. Let r represent the number of glue sticks. (i) Express the problem as a system of linear equations (ii) Solve the system of linear equations by using the Cofactor method to determine the unit cost of each item.

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A: Given

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A:

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A: Here is the solution:

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A:

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Q: 1 0 0 0 0 1 2 -6 2 -8 10 1 0 1 0 3 -2 -5 -16 |

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A:

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A:

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A: Given,     122-2

Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.