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Before you try to work out the probability, establish the following answers from the question and jot them down. How many items are there in total? After something is chosen, is it put back before the nex...

Look for the corresponding letters to each number. So, as an example those with a. remember that the + or - before it tells us whether it is to be added or subtracted

There are 2a-a+3a so that = 4a...

This question relies on knowledge of algebraic expressions and highest common factors.

What is the highest common factor which goes into the expressions 8y and 4y^2.

The answer is 4y. This i...

I can't figure out this question to do with VAT. VAT is charged at 20%. A TV is for sale for £650 inc. VAT in Good Electronics and the same TV is for sale £495 exc. VAT in Wright's Electricals, where is i...

BIDMAS is used to determine the first step in solving this problem. The bracket on the right hand side is expanded first. 9x-4=7x+14. Now the x's and numbers must be moved to opposite sides of the equals ...