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expand (x-3)^2

firstly explain (x-3) 2 = (x-3)(x-3) on the whiteboard I'd draw a square grid with each of the numbers, then I'd multiply out. E.g. x multiplied by x = x 2 ; x multiplied by -3 = -3x and so on.. (remembering...
IT
Answered by Imogen T. • Maths tutor
11695 Views

Describe the formation of a waterfall

Waterfalls form where the river bed has a layer of harder rock overlying the softer rocks. As water falls the softer rock is eroded more quickly than the harder rock leading to undercutting of the harder roc...
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Answered by Emma R. • Geography tutor
5099 Views

2x + 7y = 14 and x + y = 2. Find the value of x and y which satisfy both equations.

There are 2 ways to solve simultaneous equations which are by substitution or elimination. In this example you can use both but elimination is simpler. So we have 2x + 7y = 14 and x + y = 2. To use eliminati...
AS
Answered by Amir S. • Maths tutor
4998 Views

I have invested £10000 for 5 years and I how have £12763 in my account. What is my banks interest rate?

This question is an example of compound interest rates. The question asks to find the interest rate of the bank. So first of all we should form an equation relating our initial amount, interest rate, time an...
AS
Answered by Amir S. • Maths tutor
3730 Views

what is the difference between management and financial accoounting?

Management accounting collecting and analysing internal information which are used by internal stakeholders such as managers. This help them with decision making to help them achieve their objectives of the ...
MZ
Answered by May Z. • Accounting tutor
2412 Views