An item is regularly priced at $80. It is now priced at a discount of 20% off the regular price. What is the price now?

Since the discount is 20% off,

the sale price will be 100% - 20% = 80% of the regular price.

80% of $80

= $ 64

42

step-by-step explanation:

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