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The first step is finding what 15% of 65 is, i.e, calculating the booking fee. This can be done by multiplying 65 by 0.15 (0.15 being what 15% would be, if expressed in decimal form).65 x 0.15 = 9.75.This...

First work out how many balloons he will need to buy. In order for each bag to have two balloons, he will need 70 balloons. Since he can buy 20 balloons at a time, this implies the mi...

There are two ways of doing this question, one would be to sketch the graphs and see which are parallel to and which are perpendicular to the original line. Whilst this is valid, sketching lines isn’t alw...

y=3x⁴-8x³-3
Let's say we want to calculate dy/dx. For a term Axⁿ, the differential with respect to x is Anx^n-1. For a constant value, we can say t...

This is an example of an arithmetic series because each term is +4 from the previous term.This means for the "nth term" we start with +4n.Now we take a specific term from the sequence e.g. 3 (1s...