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QuestionThe average temperature in May is 18 ºC.The average temperature in November is a third of the average temperature in May.The average temperature in September is twice the average temperature in No...

Adding decimal numbers is done exactly the same as normal numbers: the column method.When you have 2 decimal numbers to add together the most important thing is to line up the decimal points (dots) so tha...

y=3x (1)

2x+y = 5 (2)

Here we are being asked to find what the value of x and y is. It is asking us to substitute either x or y into the equation to help us find our solutio...

In order to simplify the problem, I will solve it without using fractions.

First,  we should find the least common multiple(LCM) of the days needed for Jack and Richard to paint a house. ...

To work out averages we add up all of the ages and divide by the number of people in the group.

So that means in the first group, before the new person joined in, all the ages added up an...