ok
we are ask for measuring of center
there are 3 different measures
mode, when the data value occurs the most frequently
median, is the data value in the middle of a sorted list of data
mean is the average of the numbers
so the answer is A) mean and median
Answer:
3/3 12/15 divided 3/3 = 4/3
The equation for this is (n-2) x 180
Replace n with the number of sides:
a. 9: (9-2) x 180 = 7 x 180 = 1,260
b. 19: (19-2) x 180 = 17 x 180 = 3,060
Solution of the equation: 
Step-by-step explanation:
The equation that we have to solve in this problem is:

The first step to do is to rewrite the mixed fractions as improper fractions. We have:

And

So the equation becomes

Now we multiply by 4 each term on both sides, and we get

Now we subtract 29 from both sides,

And finally, we divide both sides by 4:

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3(2x + 6)
using the distributive property
= 3 * 2x + 3 * 6
= 6x + 18
Answer: 6x + 18
[ ? ] = 18