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Maths
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A piggy bank contains 200 coins, 1/4 of these are 1p coins, 100 of these are 5p coins and the rest are 10p coins, how much is the piggy bank worth in £s?

The piggy bank contains a total of 200 coins, 1/4 of this is 50, this means the piggy bank must contain 50 1p coins, we can convert this to £s by dividing by 100, which gives us £0.01 which we can times b...

HO
Answered by Henry O. • Maths tutor
3143 Views

œintegrate xe4x in respect to x

1/4xe^4x-1/16e^4x +c

MA
Answered by M A. • Maths tutor
3872 Views

The point on the circle x^2+y^2+6x+8y = 75 which is closest to the origin, is at what distance from the origin? (Taken from an MAT paper)

This is a good example of a question where intuition about geometry is important. Completing the square is a standard A level practice to find the equation of a circle. Doing this we get(x+3)

JM
Answered by Jack M. • Maths tutor
6970 Views

Can you prove to me why cos^2(X) + sin^2(X) = 1?

The answer to this lies in the geometry of a circle. At GCSE you were taught that a circle has a radius (which I will call R) which is the distance from the centre to a point on the circle. We pu...

JM
Answered by Jack M. • Maths tutor
3626 Views

A) Raf, Jasmin and Carlos swim lengths of the pool for charity. Raf swims 30 more lengths than Jasmin. Jasmin swims four times as many lengths as Carlos. Altogether they swim 372 lengths. How many lengths each person swim?

NB: Algebra question. As Carlos swims the lowest amount of lengths compared to Raf and Freya, and the information from the question follows from the total amount Carlos has swam, we use the symbol 'S' to ...

FW
Answered by Fergus W. • Maths tutor
2785 Views

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