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Simple interest means the amount of money increases by the same amount each year, compound interest means the amount of money increases by the same proportion each year. For example if you deposited £100 in ...

1 portion of orange cordial is mixed with 9 portions of lemonade There are 10 portions in total one-tenth of the total volume would be the volume of orange cordial needed (1/10) * 1500 = 150 Therefore 150ml ...

Let's go back to the definition of division: If we have a number o apples a and b persons to share them with, we can say that each person gets a/b apples. Example: 4 apples and 2 persons : 4/2= 2 apples for ...

Using FOIL to expand the brackets we get 9 - 6 root5 + 12 root5 + 8*root5^2 Square rooting then squaring a number cancels out, so we are left with 8*5 or 40 for the last term. Simplify to give 9 + 6*root5 + ...

Step 1 Collect x terms on one side (here we subtract 3x from both sides to give 2x on the left, and 0x, on the right) Step 2 Collect the non x terms on theother side (here we add 4 to both sides to give 0 on...