Top answers

Maths
GCSE

what is differentiation for?

When differentiating you find the gradient of the function/line, this means how fast does the function goes up or down.

RB
Answered by Richard B. Maths tutor
2280 Views

The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5. Work out the area of the triangle.

So, working out the different side lengths of the triangle is going to help find the area at the end. We split the ratio up into 3s and show them as a proportion of the whole perimeter. For example, one s...

RG
Answered by Roberto G. Maths tutor
8905 Views

How do you factorise a quadratic equation?

You should already be familiar with multiplying out brackets to arrive at a quadratic equation, which will look something like the following: (x + 2)(x + 3) = x2

EM
Answered by Eleanor M. Maths tutor
2605 Views

How do you find the original price of a sale item when a percentage decrease has been applied?

Let's use an example, for instance, a pair a trainers in the sale are advertised as having 25% off, and are now a price of £24. How would you find the original price of the trainers before the sale?Firstl...

EG
2621 Views

For what values of x is 2x^2 - 11x - 6 > 0 ?

The first step is to factorise the equation into two brackets. In this case we get (2x+1)(x-6)Now, for this to be greater than zero we need both brackets to be greater than zero, or both brackets to be le...

RK
Answered by Rowan K. Maths tutor
3163 Views

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