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Why do I keep getting the wrong answer when tackling percentage change questions?

Percentage change isn't always as simple as you think. Whilst taking into consideration if it is a percentage increase or decrease, you also need to consider whether you're calculating a result before or aft...
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Answered by Emma S. • Maths tutor
3421 Views

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For English B the questions take on the form of reading and writing exercises - thus it is extremely difficult for me to come up with a "question" per se - the way of tutoring for English B that I ...
AL
2644 Views

The probability of obtaining heads on a biased coin is 0.4. The coin is tossed 600 times. Write down the mean number of heads and the standard deviation of the number of heads.

The distribution of heads on a biased coin will be binomial - there are only two possible outcomes for a given throw (disregarding the coin standing upright after a toss). Thus X ~ B(600, 0.4) - where X is t...
AL
Answered by Aleksander L. • Maths tutor
17365 Views

With reference to a poverty trap (poverty cycle), explain how “investing in human development is crucial to ... reducing poverty”

A poverty trap is a vicious cycle that can be observed in poorer societies or poorer members of rich societies. It is caused by lack of capital - this includes natural capital, human capital, and actual capi...
AL
6411 Views

Solve x^2 – 6x – 8 = 0 Write your answer in the form a ± √ b where a and b are integers. (Higher tier paper)

To solve this equation we cant use the PSF method, as nothing multiplies to -8 and adds to -6. (Also in the question it says the answer will be in a±b which is normally what you get when you can't factorise)...
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Answered by Alex D. • Maths tutor
19808 Views