What the answer is and how to solve it

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

Aefg - almn. find the ratio of aefg to almn. a)1: 4 b)1: 2 c)2.1 d)4: 1

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong