What times what equals -4.75 but added together equals -9

What is the distance between (–2 1/2,-3) and (1, –3)?

Need ! give step by step solutions on how to solve number one [tex]\frac{9-2\sqrt{3} }{12+\sqrt{3} }[/tex] number two [tex]x+4=\sqrt{13x-20}[/tex] number three (domain and range) [tex]f(x)=2\sqrt[3]{x} +1[/tex]

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