Who has had one of their questions deleted before

Find the value of the cosine for angle a

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.

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.