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the determinant is calculated using the formula ad - bc where a,b,c and d are the following positions in the matrix [a   b                                                                                  ...

e.g : 2,4,6,8..

the formula for the sequence can be found by using a+(n-1)d , where a is the first number in the sequence and d is the diffenece between the adjacent numbers in the sequence. so a =...

Well, for numbers, we have a number axis which is a straight line (like this [...]) and it is divided into more pieces, of one unit each. We begin to draw this axis by placing zero in the middle (like thi...

The probability that the first sweet Hannah eats is orange is 6/n, as there are n sweets and 6 of them are orange. If this is indeed orange, then there are now n-1 sweets left in the bag, of which 5 are o...

Factorise and solve x² - 8x + 15 = 0.

When factorising there are 3 things to look for;

1. A common factor in each component of the equation. In this case there are no commo...