Mean:13 Median:12.5 Mode:12
Set it up like this:

. Then you would cross multiply which would result in:

. Divide by 9 on both sides and

.
Answer:
1) <11 and <14 are Same-Side Exterior Angles causing them to be supplementary.
2. <8 and <9 are Same-Side Interior Angles causing them to be supplementary.
Step-by-step explanation:
See answer above.
x=7th root of 30=1.6256
Justification=a process that is both individual and social undetermined in developing
And you have to subtract in the math