Answer:
Step-by-step explanation:
Use the following formula:
slope: 
Let:

Plug in the corresponding numbers to the corresponding variables:

is your answer.
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Answer:
it is 8.5 x 10^2 because when you times the 10 twice and then multiply it with 8.5 and the decimal moves
51,
Find angle y first by setting it equal to 180
With its adjacent angles. Then solve for x by triangle angles
3a =18
3a/3 = 18/3
a = 18/3
a = 6
Hope this helps
Answer: 17+ 16 = 33
Good luck !