znuxria znuxria 15-08-2021 Mathematics contestada 6. (a) Convert 1101012 into decimal number system. b) Convert 456 into quinary number system. 7. (a) Find the mean of the given data. 2, 7, 9, 12, 15 (b) Factorize: a2 - 18a + 81 (C) Find the cube of; a+3