A firm allocates staff into two categories: welders, fitters. It is estimated that for their three main products the time spent, in hours, on each item is given in the following matrix.                       Boiler             Water tank           Holding frame Welder              2                       0.75                      1.25    Fitter                 1.4                     0.5                       1.75 The wages, pension contributions, and overheads per hour are known to be:                          Welder        Fitter Wages                 10                8 Pension                1                 2 O/heads              0.5               1 Find the total amount that is paid by the firm per hour in terms of wages. Find the total amount paid by the firm in pension head, if the firm produces 3 boilers and 5 holding frames. Estimate the total cost of producing 10 boilers, 25 water tanks, and 30 holding frames to be paid by the firm in all heads

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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.