Question

Write and solve an equation to find the variable.

Answer 1

see explanation

Explanation:

The mean of a set of data is calculated using

mean =
`(totalscore)/(count)`, that is

`(5.2+8.3+8.5+7.7+7.8+y)/(6)` = 7.1

37.5 + y = 7.1 ( multiply both sides by 6 )

37.5 + y = 42.6 ( subtract 37.5 from both sides )

y = 5.1