What is the mean for the data set? {39, 43, 46, 86, 22, 39, 75}

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

Astudent simplified a rational expression as shown.

Yvaries directly as x. y =90 when x=6. find y when x=13