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Prove that the lines 2y=3-x and y-2x=7 are pependicular.

We can find out whether lines are perpendicular by comparing their gradients. Each gradient should be the negative reciprocal of the other - for example, 3/2 and -2/3, or 4 and -1/4. (Writing the number as a...
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Answered by Pranavi M. • Maths tutor
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How can I get the best result in my speaking exam?

I find with speaking exams, although daunting can be broken down into a formula for success! Using variety of stock phrases, idioms, grammar points and intresting facts is something I work on with students a...
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Answered by Emily J. • French tutor
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How do I balance redox equations in acidic reactions, without trial and error, using half equations?

Here is a summary on the steps to complete these question types. Determin oxidation numbers 2. Figure out what is being oxidised and what is being reduced. 3. Write half equations. 4. Balance the atoms exclu...
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Answered by Imaany K. • Chemistry tutor
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How do I get the higher marks in an A Level history essay?

To get higher marks, you have to make sure that you have three clear factors to answer the question. For example, if the essay was " ‘The political violence of the extreme right caused the biggest threa...
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Answered by Ellen B. • History tutor
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To What Extent Did the Alliance System Cause the First World War?

Although the system of alliances which underlay the geopolitics of late 19 th and early 20 th century Europe did not directly cause of the outbreak of war in 1914, it was critical in the formation of the pol...
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Answered by Adam J. • History tutor
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