Can I have some help please:))

Which system of linear inequalities is graphed? can somebody pleasssse

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.