'Write an equation for the line that passes through (1, 5) and is PERPENDICULAR to the line -7x-5y=18" ?How do I do it?
same thing ALMOST as a parallel; swap you numbers of x and y; and negate one of them; then fill in the point and change the constant
-7x-5y=18 ; swap numbers -5x -7y=18 ; negate on of them, ill turn -5 into 5 5x -7y=18 ; now chop off the and and solve with the point given 5(1) -7(5 ) = N
care to take a try at what N will be?
-30?
thats what I get too :) soo.... 5x - 7y = -30 is one way to write the equation of the perp.line
there are many "forms" that an equation can take, but they all amount to the same line
I have ALOT of math questions be prepared :)
for instance: all these are the same value 5x -7y = -30 -5x +7y = 30 y = (5/7)x + 30/7 and a few others
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