5whole numbers are written in order, 4 , 7 , x , y, 11
the mean and median of the 5 numbers are the same , so what are the values of x and why and how did you work it out?
this is part of my maths homework , so need the answer as soon as possible , again!

If the class was going to get a class pet and 5 picked fish and 7 pick bird and 8 picked rabbits have many students were in the

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).