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Opportunity cost is defined as the next best alternative forgone. This is essentially, all the other alternatives that have to be given up when you make a choice. For example, the opportunity cost of going t...

4m +3 >15 -3 from each side 4m >12 divide each side by 4 to get m on its own m>3

An author might use colour to convey a particular mood or emotion. We intuitively associate colours with certain feelings; for example, red is often associated with danger or fear. By using this colour, an a...

A volt is a joule per coulomb.If you're struggling to remember try and picture the situation. Imagine current as individual units of charge passing through a battery. The charge has passed round the whole ci...

Your introduction should briefly set up the parameters of your essay; and touch on the themes and topics that you're going to cover in your essay. It's essentially the tl;dr of your essay, but you have to wr...