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How do you work out the mean of a set of numbers?

You find the mean of a set of data by adding up all of the values then dividing the number you get by the total numbers in the data. An example of this is: 'Find the mean of '6, 8, 9, 17' -First you add up a...
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Answered by Erin M. • Maths tutor
4084 Views

Complete the square for the quadratic expression x^2 − 8x + 7

As the coefficient (the number before) of x 2 is 1 we can start the expression with (x...The coefficient of x is -8 so we half this to complete the brackets and form (x-4) 2 ...Next the square of -4 is subtr...
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Answered by Megan B. • Maths tutor
6292 Views

What is a chiasmus and what is its purpose?

A chiasmus is a literary technique where concepts or grammatical features are repeated but in reverse order. A simple way to remember it is A-B-B-A, just like the band! For example: (Aeneid VI.102) ut primum...
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Answered by Olivia C. • Latin tutor
8174 Views

Suggest reasons why levels of carbon dioxide in the atmosphere have changed over time.

CO 2 levels in the atmosphere could have increased due to deforestation, as there are now less trees to re-absorb this gas. Emissions of CO 2 may also have risen due to the increased burning of fossil fuels,...
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Answered by Sam J. • Geography tutor
3129 Views

Décrivez ce que vous avez fait lors de vos dernières vacances d'été.

Pendant mes dernières vacances d’été, je suis allé rester chez un ami a moi dans le sud de la France. Il n’habite pas loin de Nice, une cité sur la côte, alors nous avons passés plusieurs jours sur la plage....
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Answered by Sam J. • French tutor
7505 Views