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x = 110y = 30From x: y = 11:3 we can rearrange to find x = 11y/3 or y = 3x/11We can then substitute into x + y = 140 to get 11y/3 + y = 14y/3 = 140 y/3 = 10 y = 30once we have y, we can find that x + 30 =...

a company could either perform a merger or a takeover allowing them gain complete shares in another company therefore overtaking it as well as becoming one.

Making x the subject means we must rearrange the equation to get it into the form 'x='First, we need to get all the x's on one side; to do so, we will subtract 2x from each side to give 2x+7-2x=5x-2x. Thi...

From the binomial theorem we know that the x^3 term in the expansion of the above expression must satisfy,
4C3 * (3x)^3 * a = 216x^3.
Hence, after multiplying out we must have,
108a * x^...

Atomic number = the number of protons per atom of this isotopeMass number = total number of protons + neutrons per atom
Therefore, an atom of this isotope has 7 protons and 15-7=8 neutrons.
As ...