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In formal contexts, such as job interviews or academic presentations, you shouldn't use slang or coloquial phrases, but a polite structure, such as: "Mi nombre es..." instead of "Me llamo...&q...

One method of solving these is by elimination . We can try to subtract a multiple of one equation from the other to cancel the x's (or y's). 5x - 3y = -1 (A) 3x + y = 5 (B) In this case, we can add 3*(equati...

These three literary devices are often misidentified and confused with one another. However, there are some easy ways to work out which one you are observing in use in a given text. Personification refers to...

Differentiation can be done term-by-term, so we can treat the 5x 3 , -2x 2 and 2 separately. We can also 'take out' the coefficients: to differentiate 5x 3 , for example, differentiate x 3 first and then mul...

There are two different types of wave: longitudinal and transverse . When you hear the word "wave" you are probably thinking of a transverse wave. Imagine you are floating in the sea. The waves of ...