Form 4 Mathematics
(b) Mambo bought 3 exercise books and 5 pens for a total of Ksh 165. 1f Mambo had bought 2 exercise books and 4 pens, he would have spent Ksh 45 less. Taking x to represent the price of an exercise book and y to represent the price of a pen:
(i) Form two equations to represent the above information.
(ii) Use matrix method to find the price of an exercise book and that of a pen.
(iii) A teacher of a class of 36 students bought 2 exercise books and 1 pen for each student.
Calculate the total amount of money the teacher paid for the books and pens.
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