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Migrants increase the tax base (the number of people paying taxes), which is an economic advantage.They can also stabilise the birth rates of countries with ageing populations, because migrants are very o...

To solve a simulatious equation, you should place the contents of each bracket equal to 0.
so (2x+3)=0 and (4x-2)=0
Lets start with the equation on the left.
2x+3=0
Minus...

Crude oil is a mix of hydrocarbons which have different boiling points. Larger hydrocarbon molecules and/or chains have higher boiling points as they have stronger intermolecular forces. The mixture of hy...

y = 5x - 5

Halogen atoms like chlorine and iodine usually react by gaining an electron to fill their outer energy level in order to resemble the noble gases which are more stable. Chlorine is a smaller atom than iod...