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simplfy x/3 + x/4

When simplifying algebraic fractions, first times all the components by the denominator (number on the bottom) of the first component. In this case, that is 3. x/3 times 3 = x and x/4 time 3 = 3x/4. This is ...
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Answered by Tabitha M. • Maths tutor
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How to structure an essay for History SL/HL paper 2?

Before we even start writing, look at the question. See if it helps you structure the essay in any way. Does it say what areas should be discussed? For example, "Compare and contrast two totalitarian le...
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Answered by Urszula K. • History tutor
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How do I know when to use preterit or imperfect tense?

This is something that many students struggle with but luckily it is simpler than it seems and once you know it, you know it! I like to use an example that I can refer back to if I get confused: Estaba leyen...
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Answered by Tabitha M. • Spanish tutor
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At what angle does total internal reflection occur?

This question is to do with the refraction that occurs when a light ray hits a boundary between two media of different refractive index. We know that the relationship between the angle of incidence and angle...
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Answered by Alex S. • Physics tutor
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2x + 7 = 13 - 2x. What is the value of x?

4x +7 = 13 4x = 6 x=6/4 x=3/2
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Answered by Joshua L. • Maths tutor
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