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Times both side by r to get ar+3r=2a+7 Subtract 2a and 3r from both side to bring a to one side, ar-2a=7-3r Factorise the left handside, a(r-2)=7-3r Divide both side by r-2, a=(7-3r)/(r-2)

Usually the action of water such as an estuary entering the ocean at a coastline provides conditions for erosion and constant flow which means sediment is washed away and transported in the sea and can no...

The patriarchal society of Elizabethan times meant there was a certain expectation for women to be submissive and conform. In The Taming of the Shrew, Shakespeare creates the opposite to this ide...

After the ingestion of a meal containing carbohydrate, glucose is released into the blood stream from the gut. An increase in blood glucose stimulates the secretion of the hormone, Insulin from the pancre...

The probability of picking a ball from a bag is the number of balls of that colour divided by the total number of balls.

Therefore in the first instance, the probability of a red ball is 3/9 or 1/3...