The answer is not any of the letters. I got x=15/2 or x=7.5. You may have made an error in your question.
Answer:
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Step-by-step explanation:
When finding the mean you add up the numbers that are needed to find the mean and divide them by the amount of numbers you added. For example question 5 you will add 58+58+62+55+49+48 which will equal 330 and then divide it by 6 because there are 6 numbers which is 55.
The angles are congruent and corresponding. You can find the missing angles by subtracting the existing ones from 180.
First, 10 1/2 is the same as 21/2
If there are 12 inches in a foot then
21/2*12=126 inches
