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2x + y = 3   therefore  y = 3 - 2x

Substitute y = 3 - 2x in to the first equation:

3x + 2(3 - 2x) = 4

3x + 6 - 4x = 4

-x = -2   therefore x = 2

Substitute x = 2 in to ei...

Key facts to be noted by student:

Molar mass of ethanoic acid = 60 g/mol.

pK_a = -log(K_a)

pH =-log([H⁺])

Concentration of acid solution = 3/60 =...

1. Helicase unwinds the DNA double helix strucutre

2. This is done by breaking the hydrogen bonds

3. Only one strand is then used as ...

To complete the square for the equation ax² + bx + c = 0 there are three steps.. 1. In order to complete the square, we need to take the first two parts of the quadtratic equation, and put them in the for...

In James Fenton's poem, the speaker expresses anguish at the romantic situation between himself and his lover through his use of coined terms. The speaker suggets his frustration at the unreciprocated lov...