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c is a positive integer. Prove that (6c^3 + 30c) / (3c^2 +15) is an even number.

We aim to factorise the numerator. This would give 6c(c^2 + 5). We then factorise the denominator. This would give 3(c^2 + 5). Since (c^2 + 5) is present in both the numerator and denominator, it will cancel...
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Answered by Oliver B. • Maths tutor
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What determines whether something is acidic or basic?

The pH of a particular substance depends on the functional groups that it has within its structure. What is a functional group? A functional group is a group of atoms and bonds within a molecule. The way the...
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Answered by Emily A. • Chemistry tutor
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Why choosing to study French ? Pourquoi choisir d'étudier le Français ?

La langue française est riche et complexe mais ouvre une multitude de porte. Elle conduit à la découverte non pas seulment d'un language mais aussi d'une culture et d'un pays. Have you ever visited France ? ...
LM
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Can you please describe why the 1882 Married Women's Property Act was important to a married woman's rights?

The law allowed married women to own and control property in their own right; a wife got the right to own, buy and sell her own property. Married women were also able to hold stock in their own names after t...
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Answered by Cornelia G. • History tutor
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What is Customer Service and why is it important for a business?

Customer Service is a service given to customers before, during and after purchase to a standard thats meets customer needs. An example of good customer service is offerering advice pre sales, this would inv...
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