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In this example, we want to find values for both x and y which are our unknowns. So we start by rearranging x to be on its own but still in terms of y. We then can plot it into the next equation. Hence we ge...

With sequences we should follow the general formula of An + B . The n refers to the position in the sequence i.e. for the 3rd number in the sequence (which is 2 in the above sequence) n=3. The A refers to th...

We can calculate the area of a circle using the following formula:A = pi x r 2 The area we are given is 16pi. Therefore, we can divide both sides by pi. So,16pi = pi x r 2 becomes16 = r 2 We can squareroot b...

To answer this question, we need to form an equation to work out the nth term of the series. To do this, the first thing we do is calculate the difference between each term.7 - 3 =411 - 7 = 415 - 11 = 4The d...

To find the next three terms of the sequence, we first need to work out the pattern.The difference between the first two terms is 17 - 14.5 = 2.5The difference between the second and the third term is 14.5 -...