Top answers

Maths
GCSE

How do I calculate the gradient of a linear (straight) graph?

To find the gradient of a straight line we can use the change in the X and Y directions.

The gradient (Slope) of a straight line is defined as :

​Grad = (Change in Y) / (Cha...

Answered by Nathan A. Maths tutor
6082 Views

The price of a book is £4. In a sale the price is reduced by 30%. Work out the sale price.

The full price (100%) is £4The sale price is 30% less. So the sale price is 70% of the original price.£4 * 0.7 = £2.80

Answered by Elakkeya J. Maths tutor
4164 Views

These are the selling prices of 5 houses in 2007: £145 000, £170 000, £215 000, £90 000, £180 000. Work out the mean selling price.

There are different types of averages: the MEAN, the MEDIAN and the MODE. The mean average is where we add all the numbers up together and divide by the amount of numbers provided. So for this case, we...

Answered by Kate H. Maths tutor
4245 Views

Whats the difference between the three main trigonometric functions?

Sin(x), Cos(x) and Tan(x) are very useful functions and can be used to solve algerbraic problems where the aim is to find the size of an angle or a size.

Sin(x) = Opposite/Hypotenuse

<...
Answered by Michael G. Maths tutor
4217 Views

How do I know which trig formula to use in the exam?

When faced with a problem that involves triangles, there is a simple flowchart you can follow to determine which formula or identity you need to use! Firstly you must ask yourself whether the triangle ...

Answered by Joseph O. Maths tutor
11635 Views

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