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What is Pythagoras' Theory?

Pythagoras' Theory explains that the length of sides in a right angled triangle are related. This means we can use the length of two sides to find that of the third! The relationship he found is a 2 + b 2 = ...
AR
Answered by Alexander R. • Maths tutor
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What is a confidence interval?

Using the normal distribution, we can estimate a range of values which we expect to contain the mean. For example, if we take a sample of 30 students height, we can estimate the mean height of students in th...
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Answered by Alexander R. • Maths tutor
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Factorise the quadratic equation: x^2 + 5x + 6 = 0 and hence find the two solutions to the equation.

Start by writing the equation out again: x 2 + 5x + 6 = 0 I do it by thinking which two numbers add together to = 5 and which same two numbers multiply to = 6. The answer to this is 2 and 3. So the next step...
CJ
Answered by Callum J. • Maths tutor
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i) Simplify (2 * sqrt(7))^2 ii) Find the value of ((2 * sqrt(7))^2 + 8)/(3 + sqrt(7)) in the form m + n * sqrt(7) where n and m are integers.

i) (2 sqrt(7)) 2 = 2 2 sqrt(7) 2 = 4 * 7 = 28 (1 mark) ii) First of all substitute the answer from above. ((2 * sqrt(7)) 2 + 8) / (3 + sqrt(7)) = (28 + 8) / (3 + sqrt(7)) = 36 / (3 + sqrt(7)) Multiply by (3 ...
AB
Answered by Andrew B. • Maths tutor
8115 Views

Work out 64^2/3

64/4/4=4 4x4=16 n.b no square root function on my divice
TL
Answered by Thomas L. • Maths tutor
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