The sum of its last two digits is equal to its second digit increased by 5, the sum of its outer digits equals to its second digit decreased by 3. If we write the digits of the number in reverse order, the number increases by 2,178. Find the number. A cylinder made out of the yellow copper has the weight of 6.297 kg and the volume of 750 cm3.
Problem 10. If \displaystyle A=B\times C A = B ×C, find the matrix \displaystyle A A. \displaystyle B=\left [ \begin {array} {ccc} 1 & -3 & -2 \\ 2 & 0 & 1 \end {array} \right] B = [ 1 2 −3 0 −2 1]
the total amount the bookshop will receive from selling all the books. using matrix algebra. Solution: The bookshop has 10 dozen chemistry books, 8 dozen physics books, and 10 dozen
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