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Let line 1 be the graph of 5x+8y=-9. Line 2 is perpendicular to line 1 and passes through the point (10,10). If line 2 is the graph of the equation y=mx+b, then find m+b.

 Nov 6, 2020
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Put given line into   y = mx + b form to find   m = -5/8

    perpindicular   is  - 1/m   = 8/5

then using 10,10

y- 10 = 8/5 (x-10)    re-arrange this into y = mx + b form to compute your final answer

 Nov 6, 2020

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