Cant seem to figure this one out on my own. I'm also not too sure what ~ means here.

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c