Answer:
7/12
Step-by-step explanation:
12/12-5/12=7/12
Dot plots are used for continuous, quantitative, univariate data. They can be also used for finding outliers, compare distributions, locate the central tendency of your data, etc…
I think the fourth option is the answer. It wi give you the Side angle side postulate.
Your answer would be 18. AC must be longer than 9