Indices

Want to download the Indices revision notes in PDF format? What are Indices? An index is a power of numbers that indicate how many times it has been multiplied by itself. Here are examples indices: \({2^9},{x^3},x^{1/2}\) and others. In \({2^9}\), wherein the small number, 9, above is the index, it indicates that 2 will be multiplied …

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Algebraic Expression

Want to download the Algebraic Expression revision notes in PDF format? What is an Algebraic Expression? In Algebra, we commonly see x, y and others. Why do we use letters? How can we solve it? An algebraic expression is a combination of integer constants, variables, exponents and algebraic operations such as addition, subtraction, multiplication and …

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Travel Graphs – Distance & Time

Speed, Distance and TimeThe following is a basic but important formula which applies when speed is constant (in other words the speed doesn’t change):Speed = distancetime Remember, when using any formula, the units must all be consistent. For example speed could be measured in m/s, distance in metres and time in seconds.If speed does change, …

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Graphs

Equations of straight lines are in the form y = mx + c (m and c are numbers). m is the gradient of the line and c is the y-intercept (where the graph crosses the y-axis).