Form 3 Mathematics
(a) Given that the matrix
Find A-1 the inverse of A
(b) Kimtai bought 200 bags of sugar and 300 bags of rice for a total of Kshs. 850,000. Buya bought 90 bags of sugar and 120 bags of rice for a total of Kshs. 360,000. If the price of a bag of sugar is Kshs x and that of rice is Kshs. Y,
(i) Form two equations to represent the information above
(ii) Use the matrix A-1 to find the prices of one bag of each item.
(c) Kali bought 225 bags of sugar and 360 bags of rice. He was given a total discount of Kshs. 33, 300. If the discount on the price of a bag of rice was 2%, calculate the percentage discount on the price of a bag of sugar.
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