Which is most likely to be the first step in solving a system of nonline sur
equations by substitution?
o
a. substituting one equation into the other equation
o
b. taking the square root of both sides of one of the equations
o
c. substituting a number for one of the variables
o
d. isolating a variable in one of the equations

it's

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for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c