The trapezium is down on a centimetre grid find the area of the trapezium

Consider the function f(x)=-5x+3 what is f(-2)

The graph of a hyperbola is shown. what are the coordinates of a vertex of the hyperbola? (0, −4) (−3, 0) (0, 0) (0, 5)

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.