Posted by Johnnie on Thursday, March 19, 2009 at 7:39pm.
Help me with this problem. Write an equation of line containing the given point and perpendicular to the give line (42); 9x+2y=3
help me with this.

algebra  Damon, Thursday, March 19, 2009 at 7:42pm
We need to find the slope of the original line
One way is to put it in the form y = m x + b
2 y = 9 x + 3
y = 9/2 x + 3/2
so the slope m = 9/2
now the slope of the perpendicular m' = 1/m
= 2/9
so our line has the form
y = 2 x/9 + b
now put 4 in for x and 2 in for y and find b

algebra  Reiny, Thursday, March 19, 2009 at 7:44pm
easy way:
A line perpendicular to 9x + 2y = 3 must be
2x  9y = k
sub in your given point to find k,
all done!
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