I think the answer is the second one. A reflection over the x-axis and the a 90° counterclockwise rotation about the origin.
On a number line, v would be all the numbers to the left of -3 (for example, |-4|=4 which is greater than 3) and all the values to the right of positive 3. Since it can't equal 3, v=-3 and v=3 are not included on the number line.
What are you trying to ask ??
Given that the two cone are similar, then
3/7 = x/5
7x = 15
x = 15/7
THEY BOTH HAVE THREE WINGS IN TOTAL