Ashop owner offered a 20% discount off the regular price of a mirror. the amount of the discount was $3. what was the regular price of the item?

A shop owner offered a 20% discount. The regular price of the item is $ 15

Solution:

Let the regular price of the mirror be taken as x  

The percentage discount offered on the mirror, as given in the question, is equal to 20%  

The discount amount (D) as mentioned in the question is $3

Discount amount is given as:

Thus, the original cost of the mirror is x = 15 and after discount the price would have been 15 -3 = 12

Thus the regular price of the item is $ 15

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2