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If a badminton set has a sale price of $18, what was the original price?
$

15.2

Step-by-step explanation:

40 percent of 18 is 7.2, do 18 plus 7.2 and u get 15,2

i hope this is what you were looking for.

see attached graph

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