a) Find A-1, the inverse of matrix is as shown below. b) Okelo bought 5 physics books and six mathematics books for a total of Ksh.....

a) Find A-1, the inverse of matrix is as shown below

b) Okelo bought 5 physics books and six mathematics books for a total of Ksh.. 2440. Ali bought 7 physics books and 9 mathematics books for a total cost of ksh. 3560.
i) Form a matrix equation to represent the above information.
ii) Use matrix methods to find the price of a physics book and that of a mathematics book.
(c) A school bought 36 physics books and 50 mathematics books. A discount of 5 % was allowed
on each physics book whereas discount of 8% was allowed on each mathematics book.
Calculate the percentage discount on the cost of all the books bought.

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sharon kalunda answered the question on August 9, 2019 at 09:59

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