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vodomira [7]
3 years ago
6

Find the equation of the line perpendicular to the line x=9 that passes through the point (9,-1)

Mathematics
2 answers:
Harman [31]3 years ago
8 0

Answer:

y =1

Step-by-step explanation:

(9,-1)=(x ,y)\\\\x =m_1 =9\\m_2 = \frac{-1}{m_1} = \frac{-1}{9}  = -\frac{1}{9} \\\\Substitute \:the \:values\:into ;\\y =mx+b\\\\-1 =-\frac{1}{9} (9) +b\\-1 = -1+b\\-1+1 = b\\0 =b\\m= 1 \\Substitute\:the\:new\:values\:into ;\\y = mx+b\\y = 1 x +0\\ y= 1

tia_tia [17]3 years ago
3 0

Answer:

y = -1

Step-by-step explanation:

Notice that the line x = 9 is a vertical line, therefore a line perpendicular to it will be a horizontal line of the form y = constant number.

Since we want it to go through the point (9, -1), then we know that that y value needs to be "-1", and the equation of the line will be given by the expression:

y = -1

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There is a 20% sale on in Topshop. The bag I want is now £60. What was the original cost of my bag?
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