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What is Pythagoras' Theorem and how is it used in exam questions?

Pythagoras' Theorem is an equation used to give us more information about right angled triangles. The theorem itself looks like this: a2

TD
Answered by Tutor96690 D. • Maths tutor
3302 Views

What did Freud mean when talking about the 'Unconscious Mind'?

Freud was a psychodynamic psychologist who developed the theory of the unconscious mind. As humans, it is believed that we only have access to a maximum of 10% of our brains and the other 90% is inaccessi...

MS
Answered by Molly S. • Psychology tutor
6740 Views

Solve the simultaneous equation 2x-4y=8 and 3x+3y=-15

Set 2x-4y=8 as equation 1, and 3x+3y=-15 as equation 2. Multiply equation 1 by 3 and equation 2 by 4 so they look like 6x-12y=24 and 12x+12y=-60. Now add the two equations and you get 18x=-36 or x=-2. Sub...

DL
Answered by Daniel L. • Maths tutor
4071 Views

If Q = P / (R (4 – t)), calculate the value of Q when P = 36, R = 3 and t = –2

So seeing as you are given the values for P, R and t, the first thing you need to do is substitute the letters for their given numbers into the equation: Q = (36) / ((3)(4 - (-2)) Now expand out the b...

RB
Answered by Rosie B. • Maths tutor
4309 Views

Write x/(x-1) - x/(x+1) as a single fraction in its simplest form (Edexcel GCSE 2016)

The key concept to answering this question is to notice that you need a common denominator for both fractions in order to subtract and simplify them. Clearly the two denominators: (x-1) and (x+1) are not ...

FK
Answered by Fritz K. • Maths tutor
9477 Views

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