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To what extent was the Treaty of Versailles the most important result of the First World War?

To answer any question in history we need to pull out key terms from the wording of the question. In this question, 'Treaty of Versailles' and 'most important result' are the key terms, so keep them at the f...
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Answered by Lucy T. • History tutor
3711 Views

How do I balance equations?

Balancing equations will become natural if you do it long enough but takes a bit of practice and can be tedious! It can be a bit of trial and error at times. It is important to remember that numbers of eleme...
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Answered by Aysha M. • Chemistry tutor
3205 Views

Solve the simultaneous equation, 3x + y = 8 and x + 3y = 12, to find a value for x and y.

Re arrange one of the equation to get a single variant answer. So, x = 12 - 3y. Substitute this into the other equation, so 3 (12-3y) + y = 8. Expand this equation to form 36 - 9y + y = 8. Collect the y term...
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Answered by Grace R. • Maths tutor
7243 Views

Show that (x + 4)(x + 5)(x + 6) can be written in the form ax3 + bx2 + cx + d where a, b, c and d are positive integers.

=(x+4)(x 2 +6x+5x+30)=(x+4)(x 2 +11x+30)=x 3 +11x 2 +30x+4x 2 +44x+120=x 3 +15x 2 +74x+120
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Answered by Jiawen Z. • Maths tutor
3387 Views

Explain why an extensive network of capillaries and ventilation of the lungs helps to maximise the effectiveness of gas exchange.

The capillaries deliver blood that has high carbon dioxide levels and low oxygen levels and take away blood that has high oxygen levels and low carbon dioxide levels. This means there is always a concentrati...
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Answered by Annabel C. • Biology tutor
7451 Views