Jenny has a roll of ribbon. She used a part of the ribbon to put a bow on a gift she wrapped. The shaded region on the double number lines below show the part of the ribbon she used.
How many yards of the ribbon did Jenny NOT use?

A 24 yd
B 36 yd
C 40 yd
D 60 yd

14

step-by-step explanation:

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.