What is the principal square root of -25?

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Express -5 2/5 as an improper fraction.

Afootball quarterback has two more chances to throw a touchdown before his team is forced to punt the ball. he misses the receiver on the first throw 25% of the time. when his first throw is incomplete, he misses the receiver on the second throw 15% of the time. what is the probability of not throwing the ball to a receiver on either throw?