1) Find an equation for the given line in the form ax+by=c, where a, b, and c are integers with no factor common to all three and a≥0.
Through (-40,35) parallel to 7x+8x=19
The equation of the line in the form ax+by=c passing through (-40,35) and parallel to 7x+8x=19 is what?
2) Write an equation in standard form for the line described.
Through (3,8) perpendicular to 5x+y=7
Show Work**
Sol:
equation parallel to line ax+by+c=0 is of the form ax+by+k=0
given line is
7x+8y-19=0
for this line parallel line is 7x+8y-k=0
this passes through
7*(-40)+8*35+k=0
k=0
therefore equation of line parallel to 7x+8x=19 is 7x+8y=0
ANSWER:
parallel line to given line is 7x+8y=0
Solution2:
equation of line perpendicular to ax+by+c=0 is bx-ay+k=0
line perpendicular to 5x+y-7=0 is x-5y+k=0
this passes through (3,8)
3-5*8+k=0
-37+k=0
k=37
the perpendicular line to 5x+y-7=0 is x-5y+37=0
ANSWER:
perpendicular line to given line is x-5y+37=0
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