Waiting for your answers... Answer the following work problem. Report your answer to the nearest tenth of a year. Petra can do a certain job in 9 years. Robert can do the same job in 7 years.Petra and Robert work together to complete the same job. However, Petra starts working 3 years after Robert starts to work. How many years will it take for them to complete the job once Robert starts to work? years
Petra can do a certain job in 9 years. Robert can do the same job in 7 years.Petra and Robert work together to complete the same job. However, Petra starts working 3 years after Robert starts to work. How many years will it take for them to complete the job once Robert starts to work?