Hank bought 5 meters of ribbon for $4. the ribbon costs -$0.008, 0.08, $0.8- per -millimeter, centimeter, kilometer-. choose one answer from inside the

To determine the cost of each meter of the ribbon, we divide the cost for 5 meters of ribbon by 5. That is,
                                        x = $4 / 5
where x is the cost of each meter. Simplifying will give us an answer of $0.8/m. Converting this to per mm. 
                                   ($0.8/m) x (1 m/ 1000 mm)
                                = $0.0008/mm

First subtract 10 from both side
y^2+6y-16=0
(y+8)(y-2)=0
-8 and 2