Courtney and Joe are power washing the patio. Courtney can power wash the entire patio in 7 hours while it takes Joe just 5 hours to power wash the patio. How long will it take Courtney and Joe to power wash the patio together? Choose the equation that should be used to solve this problem and state the solution. 7t5t 12; t = 1 hour O+=1; t = 2 hours 7t+5t=1; t = 12 hours O+=1;t=5 hours