Draw 3 distinct lines that have the same y intercept

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

Find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible