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Before starting anything read the poem through twice. The first time read it just to understand meaning and get a grasp of what the author might be trying to say. The second time read the poem and highlig...

The relative atomic mass (A_r ) is calculated from 2 things : mass numbers of its isotopes and abundance of these isotopes.Let's use Chlorine as an example. Chlorine naturally exists as two isot...

In this question you are going to write to a student, you should write in an informal way: keep sentences short and easy and focus on getting the grammar right. You should use present tense and imperfect ...

Deploy the FOIL method; First Outer Inner Last(1+2x)(4x+3) = 4x+3+8x^2+6x = 8x^2 + 10x + 3

It is important to notice that this is the addition of two mixed fractions which firstly needs to be changed into improper fractions. Take 2 1/7 - first multiply the denominator by the whole number to giv...