Answer:
10
Step-by-step explanation:
sin30° =
= 
We know that the 8 represent the squared radius of the circle so to get the radius we should take the square root of 8
the answer is √8 = 2√2
Y= -1.7x + 8.5
10( Y = -1.7 x + 8.5)
10Y = -17x + 85
+17x
17x + 10Y = 85