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How can I improve my oral fluency?

Improving your foreign language speaking abilities can only come through practicing speaking. While of course listening to the foreign language will help, by giving you an idea of typical sentence constructi...
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Answered by Anita Y. • French tutor
2774 Views

Solve the simultaneous equations 2a + b =4 and 5a – 3b = -1

When you solve normal equations like 4x-2=7, there is one equation and one unknown value. This case is no different: in order to solve these equations, you need to create one equation with one unknown. We st...
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Answered by Molly M. • Maths tutor
15102 Views

Is there an easy way of telling whether a noun is masculine or feminine?

The official answer for this question is that you have to learn the gender of each new noun individually. However, quite often it is possible to guess the gender of nouns from their endings. For example, all...
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Answered by Molly M. • French tutor
3443 Views

why is the profit maximising output where marginal cost (MC)= marginal revenue (MR)?

Marginal revenue is the revenue generated by selling the last unit of output. Marginal cost is the cost of producing the last unit of output. Profit is maximised at the output where MC=MR because if less out...
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Answered by Robin S. • Economics tutor
19207 Views

When would you apply the product rule in differentiation and how do you do this?

The product rule is used to differentiate a function when it is in the form y= u(x) v(x). To use the rule you differentiate u(x) and multiply that by v(x), and then add that to the differential of v(x) multi...
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Answered by Robin S. • Maths tutor
4556 Views