486/900 = .54 = 54%. .......
Answer:
Step-by-step explanation:
90x - 60y = 68.....multiply by -1
90x - 70y = 91
---------------------------
-90x + 60y = -68 (result of multiplying by -1)
90x - 70y = 91
---------------------------add
-10y = 23
y = -23/10 <===
90x - 60y = 68
90x - 60(-23/10) = 68
90x + 138 = 68
90x = 68 - 138
90x = - 70
x = -70/90
x = -7/9 <=====
8/36
= 2/9 after dividing by 4
Please mark as brainliest.
Answer:
6
Step-by-step explanation:

The answer would be the third one .
Perpendicular would always be the opposite of your original slope.
Hope this helps! (: