Answer:
6.79
Step-by-step explanation:
-Let X denote the total amount of the job.
-The job has to be done in 5 hrs, therefore the portion done every hour is:
Therefore, the rate of Bill and Ted working jointly must equal the rate calculated above:
Hence, Bill working alone should complete the house in 6.79 hrs
Check the picture below.
the line you drew for y = 2x +3 is correct, now recall that the line for x = 3 is just a vertical line, in red, and that y = 2 is just a horizontal line, in green.
now all lines are solid because all are using ⩽ or ⩾, meaning the borderline is included, and you can do a "true" "false" region check if you wish, but less than 3 is to the left of the red one, greater than 2 is above the green one and less than 2x + 3 is just to its left.
