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There are 10 boys and 20 girls in a class. The class has a test. The mean mark for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.

72

CA
Answered by Charlotte A. Maths tutor
4131 Views

Express 56 as the product of its prime factors

23 x 7

CA
Answered by Charlotte A. Maths tutor
8101 Views

Nitrates and phosphates from fertiliser applied to crops may enter ponds and lakes. Explain how nitrate may cause the death of fish in fresh water.

Plants need three main nutrients to grow, which can be helpfully abbreviated as NPK: that's nitrates, phosphates and potassium. Many gardeners and farmers will apply these fertilisers to crops in order to...

IC
Answered by Imogen C. Biology tutor
7221 Views

Why might the government offer subsidies to the farming industry?

A subsidy is a money transfer from the government to producers in order to increase supply. Subsidies can either be provided on a per unit basis or based on total value of production, an ad valorem subsid...

JS
Answered by Joe S. Economics tutor
3590 Views

Do you agree that Shakespeare's Sonnet 116 'defines and redefines its subject in each quatrain and this subject becomes increasingly concrete, attractive and vulnerable’.

Given the length of the quotation, I would like to separate my answer into two parts. Firstly, the issue of defining and redefining the sonnet's subject, and secondly how compatible the terms 'concrete, a...

AS
3932 Views

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