Answer:
Step-by-step explanation:
-The total portion fed to the dog is 7/10 cup
-One week has 7 days. we multiply the dry portion per day by the number of days in a week.
Hence, Erin feed her dog 2 4/5 0r 2.8 cups of dry food
hint NOT answer-
28+5b=7a
The vertex of this graph is the maximum