Lines P and Q are parallel . The slope of P is 5 and the slope of Q is 10/v. What is v ?

If the two lines are parallel, then the slopes of the two lines
are same.

The slope the line P is
5.

Therefore the sope of the line Q is also
5.

The slope of the line Q is given  to be
10/v.

Therefore 10/v  shoul be equal to
5.

Therefore 10/v = 5. We solve  this equation for v to find the
value of v:

10/v = 5.

Taking the
reciprocal of both sides, we get:

v/10 =
1/5.

We multiply both sides by 10:

v =
10/5= 2.

Thereore the the value of  v = 2.