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This is a common question as we are often taught to differentiate by simply being told how to do the calculation, but not what it is we're really doing. The concept Differentiation is finding the gradient of...

Convert 0.25 into a fraction where 20 is the denominator as there are 20 balls in total in the bag. 0.25 is the same as 1/4 and to convert this to 20 as the denominator multiply both the top and the bottom b...

This is a geometry question. We know that a square has 4 equal sides of x, and that it's area is given by A=x 2 . So we can work out the length of the side of the square. x=sqrt(49) = 7 We are told this is e...

First of all let's start with a lttle explanationn of waht a polynomial is. A polynomial is a function of x denoted f(x) which is defined as f(x)=a 0 +a 1 x+. . .+a n x n which in other words is a sum of x's...

Method 1 (algebraically): Since we have "y=" at the start of both equations, we can substitue one into the other to get 3x-10=2x+5 Then we want all the x terms on one side of the equation, and all ...