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NB: Algebra question. As Carlos swims the lowest amount of lengths compared to Raf and Freya, and the information from the question follows from the total amount Carlos has swam, we use the symbol 'S' to ...

Answer: 2³ x 3³Start by breaking 216 down into easily managed factors, for example the easiest would probably be 2 and 108. From there you can break down the non-prime factors into s...

a) Our first step is to replace 3(x^2) with 3(4^2) as x=4. Remembering BIDMAS (Brackets, Indices, Division, Multiplication, Addition, Subtraction), we know we must first work out the value of 4 squared, a...

56 = 2 x 2 x 2 x 7.Prime numbers are the basic building blocks of all numbers. They can't be divided by any number apart from 1, or themseslves.

2x + y = 17 x-y = 4 ---> x = 4 + y2(4+y) + y = 17 ------> 8 + 2y + y = 17 -----> 8 + 3y = 17 --------> 3y = 9 -----> y=3 x = 4+y ------> x = 7