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1. There is a variation of phenotypes in the general population 2) Some characteristics confer an advantage in the environment 3) The organisms with advantageous characteristics survive to breed and p...

Take away 3 from both sides to give you : 5x = 15Divide by 5 on both sides to give you : x = 3

A rise in the use of fossil fuels contributes to increases in global temperatures as they trap more of the sun's radiation in the energy in the Earth's atmosphere. The burning of fossil fuels releases car...

To solve this, you need to find two factors of -15 that total to give -2. The solution we're looking for is of the for (x + something) (x + something)=0, as you can then solve each bracket to get two resu...

From our base right angled triangle (base and height of 1) and remembering SOH CAH TOA ( tangent = opposite/adjacent), we can deduce tan(45) = 1 / 1 = 1