Robert has a pen collection that includes 6 green gel
pens, 4 red gel pens, and 5
blue gel pens. If Robert
reaches into the bag
randomly and pulls out a pen,
what is the chance that he
will not draw a blue gel pen?

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

d. all of the above

step-by-step explanation:

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.