a) Find M^-1 , the inverse of Mb) In the first term of a certain year, a mixed school bought sixty pairs of girls’...

a) Find M^-1 , the inverse of M
b) In the first term of a certain year, a mixed school bought sixty pairs of girls’ socks and ninety pairs of boys’ socks for a total of Ksh 14,100. In the second term of the same year the school bought.
30 pairs of girls’ socks and 50 pairs of boys’ socks for a total of Ksh 7600.
(i) Form a matrix equation that represent the information above
(ii) Use the matrix M-1 to find the price of a pair of each type of socks
c) In the third term of the year, the supplier gave a discount of 10% on each of pair girls’ socks and a discount of 20% on each pair of boys’ socks. If the school bought 25 pairs of girls’ socks and 40 pairs of boys’ socks in the term, find the percentage discount on the cost of all the socks that were bought.

Answers

Kavungya answered the question on November 14, 2019 at 13:48

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