
Leslie W. answered 01/23/13
Tutor
5
(1)
Retired But Just Can't Quit
Start by simplifying the expression.
4y-4-(-y)-9y becomes
4y-4+y-9y, then
5y-4-9y, then -4y-4, Substitute y=4 and get -4(4)-4 = -16-4 = -20