Hello again, do you mind helping me? Thank you

Can you simplify 4/7? 24 points will be awarded!

The green family is a family of six people. they have used 4,885.78 gallons of water so far this month. they cannot exceed 9,750.05 gallons per month during drought season. write an inequality to show how much water just one member of the family can use for the remainder of the month, assuming each family member uses the same amount of water every month.

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?