Two parrallel lines may have 1 intersection point. a.) true b.) false

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

I'm confused on this could anyone me and show me what i need to do to solve it.