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What is the difference between the null hypothesis, alternate hypothesis, directional hypothesis and non-directional hypothesis?

A hypothesis is a statement about the relationship between two variables (usually, the IV and the DV). The statement must usually also be operationalised or 'testable', which is another way of saying made mo...
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An isosceles triangle has a base with length x+4 and the other two sides have length x+3. The perimeter of this isosceles triangle is 16cm. Find the area of the triangle.

First, we need to find the value of x. The perimeter of a shape is the sum of the length of all of its sides, so the perimeter of this isosceles is x + 4 + 2(x + 3) = x + 4 + 2x + 6 = 3x +10. We are told tha...
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Answered by Dominic M. • Maths tutor
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What are the advantages and disadvantages of sexual reproduction?

Sexual reproduction has many evolutionary advantages. These include: (1) a genetic variation in offspring that is not seen with asexual reproduction. (2) The variation allows the species to adapt to changes ...
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Answered by Lois W. • Biology tutor
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A shop trying to sell a laptop reduces its price by 7% at the very end of each week, from an initial price of £600. If you have £365 to spend, how many weeks must you wait until you can buy the laptop?

This is a simple question, but it's important to not get confused when thinking about how the laptop's price gets reduced. We know the price starts at £600, and that it goes down by 7% each week. If somethin...
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Answered by Kiavash S. • Maths tutor
3672 Views

How can I link my paragraphs together effectively in an essay?

This is something that comes up frequently with students: how can I effectively tie my arguments together in an essay, so that the flow of the writing makes logical sense. The answer is - with a jigsaw! This...
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Answered by Marthe D. • English tutor
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