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How do I write a good introduction to my essays?

Question: "Anglo Spanish relations deteriorated in the years 1558-1588 largely as a result of reactions of the English" Assess the validity of this view. Three key things you need to do in a histor...
HG
Answered by Henry G. History tutor
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What are Economies of Scale?

Economies of scale are essentially the cost advantages that a firm can gain by expanding its output. Economies of scale reduce the long run average cost per unit when output expands. It is important to note ...
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Answered by Itohan G. Economics tutor
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how do you differentiate tan(x)

The differential of tan(x) is sec 2 (x), however knowing how dy/dx tan(x)=sec 2 (x) is very useful in differentiating other trigonometric functions. So, if we first employ the rule that tan(x)=sin(x)/cos(x),...
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Answered by Olukorede S. Maths tutor
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What is depreciation? Why is its calculation necessary? Give an example of straight line depreciation.

Depreciation is a periodic year end accounting adjustment (not an actual cash change), which represents the physical wearing out of Non-Current Assets ( NCAs) such as vehicles and buildings. If firms did not...
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Answered by Louis H. Accounting tutor
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Solve the simultaneous equation: y+4x+1=0 y^2+5x^2+2x=0

Rearrange the first equation to get y on its own: y=-(1+4x) Substitute into the second equation: (1+4x)(1+4x)+5x^2+2x=0 21x^2+10x+1=0 Substite into the quadratic formula to solve (-b+/-(b^2-4ac)^0.5)/2a
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Answered by George L. Maths tutor
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