How do I solve for this ?

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

If rt is greater than ba, which statement must be true ?