Can someone help me with #1 #2 #3 please I really don’t understand

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

Using graph paper, determine the line described by the given point and slope. click to show the correct graph below.(0, 0) and 2/3