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A simultaneous equation is when we have 2 equations which both have X and Y in them. The best way to solve these equations is to rearrange one of them to make either X or Y the subject, and then substitut...

Most verbs take the auxiliary verb (think, the helper verb) 'avoir' to form their past tense.
E.g. 'penser' - j'ai pensé (I though, I have thought).
However there are a number of verbs that wi...

Calcium has 20 electrons.
The first ring can only contain up to 2 electrons.After that rings can only contain up to 8 electrons.
Therefore the electronic config...

The pronunciation of this vowel can be daunting at first, but once we learn the rules it is actually no more difficult than learning the pronunciation of a similar vowel in English (think about how in the...

1- Prophase2- Metaphase3- Anaphase4- Telophase