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Let f(x)=x^2-ax+a-1 and g(x)=x-5. The graphs of f and g intersect at one distinct point. Find the possible values of a.

If the two graphs intersect, it means that they will share the same y and x coordinates at one particular point. (I will draw diagram to show point). Therefore, you can set f(x)=g(x) so that x^2 -ax +a -1 = ...
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Answered by Andres O. • Maths tutor
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What is the difference between 'ser' and 'estar'?

As with 'por' vs 'para, understanding how to use the verbs 'ser' and 'estar' can be tricky when learning Spanish, given both verbs translate as 'to be' in English. As a general rule, 'ser' is used to describ...
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Answered by Emily E. • Spanish tutor
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Putting bee honey on a cut kills bacteria. Honey contains a high concentration of sugar. Use your knowledge of water potential to suggest how putting honey on a cut kills bacteria. (AQA BIOL1)

Sugar is a solute and is able to dissolve in water. When sugar is dissolved in water, it has a low water potential. Water moves from a high water potential to a low water potential; from where there is a low...
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Answered by Charlotte S. • Biology tutor
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What is the Difference between saturated and unsaturated fatty acids?

Firstly, saturated fatty acids are where all the carbon atoms have single bonds between them making the lipid saturated as no more hydrogens can be added. Having no double bond means the fatty acid is straig...
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Answered by Katie D. • Biology tutor
84188 Views

What are the economic problems associated with an ageing population?

Firstly, an ageing population puts a greater strain on health services, which will therefore require more government funding; this is particularly an issue because elderly people are more susceptible to heal...
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Answered by Anna C. • Geography tutor
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