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How would a reflex action take place?

First of all, the stimulus (a change in environment) will cause the receptor in the skin to fire an action potential down the sensory neurone. The sensory neurone then reaches the relay neurone in the CNS (w...
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Answered by Sumandeep K. • Biology tutor
4882 Views

How do I solve simultaneous equations by substitution?

Often, substitution is used when dealing with quadratic simultaneous equations as the other method, elimination, is more straightforward and can be used to solve linear equations but it cannot be used for qu...
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Answered by Niamh M. • Maths tutor
6430 Views

what is most important for the exam?

Vocab! Vocab is the most important thing to learn. If you know the vocab you will be able to get a rough gist of a sentence even if you don't understand all of it. There will be words in the unseen that you ...
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Answered by Victoria B. • Latin tutor
2748 Views

How do I do better in my listening exercises?

The speed in listening exercises is often much faster than what you are used to. To try and understand all of what is being said will be impossible; as once you have you have worked out the first it might ha...
VB
Answered by Victoria B. • French tutor
3012 Views

Hannah's sweet problem (Edexcel 2015): There are n sweets, 6 are orange, rest of the sweets are yellow. She takes 2 sweets randomly without replacing them and the probability that 2 orange sweets are chosen is 1/3. Show that n^2-n-90 = 0.

Draw a probability tree diagram. For this question, only two branches are required (orange and orange). At the start, there are n sweets in total, 6 are orange, so p(O) = 6/n. On our second pick, there are 5...
YZ
Answered by Yimin Z. • Maths tutor
5773 Views