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Let M and N be constants. The graphs of the lines x+5y=7 and 15x+MY=N are perpendicular and intersect at (-8,3) Enter the ordered pair (M,N)
 

 Mar 16, 2020
 #1
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Equation of first line: y = -1/5*x + 7/5:
Equation of second line: y - 3 = -5(x + 8)

y = -5x - 37.

3y = -15x - 111

15x + 3y = -111

 

(M,N) = (3,-111)

 Mar 16, 2020
 #2
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Let M and N be constants. The graphs of the lines x+5y=7 and 15x+MY=N are perpendicular and intersect at (-8,3) Enter the ordered pair (M,N)

laugh
 

 Mar 16, 2020

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