This answer is pretty simple.
Since there are 3 yards of ribbon, and you need to make ____ number of pieces with each 1/4 long
To do this you divide.
3 divided by 1/4
The answer is 12
Aimee is correct because a stop sign is an octogon. Octogons contain only obtuse angles.
I think it is because they are both different differences
Multiply both sides by 19 to get w=171