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Find the gradient of y=x^2-6x-16 at the point where the curve crosses the x-axis

So we have y = 0 and therefore x 2 - 6x - 16 =0 This is then factorised to (x+2)(x-8) = 0 and therefore we have x = -2, x = -8 To find the gradient we need to find dy/dx So dy/dx = 2x - 6 Therefore if x = -2...
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Answered by Holly K. • Maths tutor
4809 Views

How do you know if you should use the perfect or imperfect tense?

Generally, the imperfect tense should be used for events which happened regularly in the past or which took place over a period of time. The perfect tense is used more for one off events. So for example, if ...
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Answered by Leah T. • French tutor
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What are the advantages of First Past the Post?

The Advantages are: Leads to effective, strong and stable government Provides a clear link between MPs and their constituents Prevents a minority party holding an excessive amount of power. This was the case...
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Answered by Kirsty S. • Politics tutor
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What are receptors?

Receptors are a group of specialised cells that are used by the body to detect different stimuli (changes in the environment). Receptors are most common in sensory organs like the eyes, ears and the skin. Ad...
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Answered by Kirsty S. • Biology tutor
16193 Views

Write a letter to a friend on the topic of healthy eating

The letter should include a introductory statement addressing the friend. It should say why/how the topic of the letter was thought of and why it could/does concern the addressee. The letter could include th...
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Answered by Andrea S. • Spanish tutor
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