Working together, two men can do a job 6 days. working alone, however it would take one may 5 days earlier than it would take the other to complete the job. how long would it take each separately? working together a couple can do a job in 20 hours working alone, however, it would take the wife 9 hours longer than it would take her husband to complete the job. how long would it take for a wife to complete the job?
Mildred has seven grades on her report card. the overall average of these seven grades is 77%. after looking more closely at her report card, mildred discovered that her english grade was incorrectly recorded as 18% instead of her actual grade of 81%. determine mildred’s correct report card average