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solve this equation: 4(x-5)=x+7

Firstly, I will provide a 'mark scheme' type answer. Then there is a full explanation available underneath. 4 (x-5)=x+7. 4x-20=x+7. 3x=27. x=9. A full explanation: 4(x-5)=x+7 (expand the equation on the left...
AM
Answered by Ashni M. • Maths tutor
11380 Views

How do I find the equation of a line that is perpendicular to another line?

Okay so let's say that the equation of the line you are given is y=2x+3 and you are told this new line must pass through the coordinates (2,4). The first thing we need to do is check we understand every bit ...
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Answered by Evie H. • Maths tutor
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To what extent do you agree with the view that writers in the gothic tradition present the boundaries between good and evil as blurred?

This question relates to the gothic ambiguity between good and evil, which is associated with the unknown and the liminal status and experience of various characters. Arguably, the boundaries between good an...
LP
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The main method of investigation in Psychology is conducting experiments. Outline one advantage and one disadvantage of this method.

Advantage: Experiments allow you to control variables which affect the dependent variable, so that it is easier to ensure that observed effects are caused by the independent variable, rather than any extrane...
SC
2721 Views

What are the requirements for natural selection?

Evolution by natural selection needs three conditions to be satisfied: variation, heredity, and competition (also called differential fitness). There must be variation in a population of a certain species. W...
MC
Answered by Michael C. • Biology tutor
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