Rory bought 4 cartons of milk, each having 2 gallons. He paid a total of $28.80 to buy the milk. How much did a gallon of milk cost to Rory?

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.

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?