A coin is flipped twice what is the probability of the outcome being a head and a tail

Which system of linear inequalities is represented by the graph? !

Can someone me with these two circle theorem questions asap?

Urgent? will give brainliest given that the blue triangle is a right triangle, which expression correctly gives the area of the red square? a) a2 + b2 b) a2 - b2 c) a2 - c2 d) c2 - a2