Answer:
Slope: 
Y-int: 9
Step-by-step explanation:

-6x -6x
-2y = -6x + 18
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-2 -2
y = 3x + 9
Ratio of complement of x : supplement of x
2 : 5
⇒ 2 times the supplement of x will be equal to 5 times the complement of x
5(90 - x) = 2 (180 - x)
450 - 5x = 360 - 2x
5x - 2x = 450 - 360
3x = 90
x = 30°
Complement of x = 90 - x = 90 - 30 = 60
Supplement of x = 180 - x = 180 - 30 = 150
Ratio:
60 : 150
60 ÷ 30 : 150 ÷ 30
2 : 5 (checked)
Yes subtracting is taking away from another. 5-3 is two because you take 3 away from 5.
2x + 5y + 7x
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Combine like terms
(2x + 7x)
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9x + 5y