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An idiom is a colloquial phrase or saying. You should try to include them in your writing to demonstrate cultural awareness and range of language. For example, 'ser un pan comido' (to be a piece of cake) ...

Enzymes are biological catalysts that speed up chemical reactions by providing an alternative reaction pathway with lower activation energy.

First, we need to remove one of the variables from one of the equations. In this case, we multiply the first equation by 4 to give 12x+4y=28.Then minus the 2nd equation from this to give 10x+0y=20.Now div...

The molecular formula for water is H20. Two hydrogen atoms and one oxygen atom form a covalent bond. Hydrogen is slightly positively charged and is attracted to oxygen which is slightly negatively charged...

First of all you need to break down the wording of each question and find key words (e.g. in a question asking to discuss the 'unsayable' this is the key word that needs to be addressed) and pick out the ...