Could someone explain how to do this

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle