What is the slope (2,-9) (-2,9)
1 answer:
Answer:

Step-by-step explanation:

(2, -9) ⇒ x₁ = 2, y₁ = -9
(-2, 9) ⇒ x₂ = -2, y₂ = 9
So the slope:

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Step-by-step explanation:
Answer:
this angle's sum is 90°
(3x+40)°+(4x-6)=90°
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