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Let P and Q be constants. The graphs of the lines x + 5y = 7 and 15x + Py = Q are perpendicular and intersect at the point (-8,8). Enter the ordered pair (P,Q).

 Jun 27, 2022
 #1
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(-8, 8)  should be on  both lines.......but it cannot be on the  first line  because

 

-8 + 5(8)  =  32

 

But  this should =  7

 

 

cool cool cool

 Jun 27, 2022

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