Question

Hannah can paint a room in 12 hours. Destiny can paint the same room in 9 hours. How long does it take for both Hannah and Destiny to paint the room it they are working together. hours = O No solution

Answer 1

`\begin{gathered} Hannah=(1)/(12) \\ Dest\text{iny =}(1)/(9) \\ x=the\text{ number of hour }both\text{ Hannah and Destiny} \\ (1)/(12)+(1)/(9)=(1)/(x) \\ (9+12)/(108)=(1)/(x) \\ (7)/(36)=(1)/(x) \\ x=(36)/(7) \\ x=5.1 \\ \text{Working together it will take 5.1 hours to paint the room} \end{gathered}`