A shop owner offered a 20%discount off the regular price of a mirror. The amount of the discount is $3.00

A) $15

Step-by-step explanation:

let x represent the regular price of the mirror

so, 20% of x = 3

20/100 * x = 3

20x = 300

x = 300/20

x = 15

Hence, the regular price of the mirror is $15

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