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Firstly, read the question and highlight any topic words or sentences that allude to what exactly the examiner is asking of you. Once you have done that, analyse the insert paper provided, by highlighting...

Hola Carlos,Felicidades en tu cumpleaños! Espero que tengas un buen dia, celebrando con tu familia y tus amigos. Como ya sabes, celebré mi cumpleanos el Viernes pasado. Fui al cine con unas amigas del col...

Protons have a +1 charge and electrons have a -1 charge. The overall charge on an atom is 0, therefore there must be an equal number of protons and electrons in an atom so that the charges cancel out. So ...

1. Identify a common denominator4(x +1)/12 + 3(2x + 5)/12 (= 2)2. Expand both brackets(4x + 4)/12 + (6x +15)/12 = 23. Multiply out the denominator4x + 4 + 6...

Divide the term in x by 2 and then put it in the bracket which will be squared. The last term from that expansion needs to be adjusted for.