What is the value of the digit five in this number 58

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

The suare root of 9x plus 7 plus the square rot of 2x equall to 7