Sum of the two numbers is 50 and their ratio is 2:3

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.

Can someone me do math because i am having a breakdown rn because i don’t get it

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.