Astore is having a 20%-off sale on all merchandise. if mai buys one item and saves $13, what was the original price of her purchase?

show how i solve this problem

The original price of her purchase is $65.

Step-by-step explanation:

Given : A store is having a 20%-off sale on all merchandise. If Mai buys one item and saves $13.

To find : What was the original price of her purchase?

Solution :

Let the original price of her purchase is $x.

Now, there is 20% off sale and save $13.

i.e. the equation became

Therefore, the original price of her purchase is $65.

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

answer: i wpould go with c

step-by-step explanation: