There are 12,000 people attending a concert. They announce that 20% of the people that purchased tickets did not come to the concert. How many people purchased tickets to the concert? (Quickly answer this if possible ​

15,000

Step-by-step explanation:

20% of 15,000 is 3,000. 15,000-3,000=12,000

1)is not similar since corresponding sides are not in the same ratio

2)are similar since corresponding sides are in the same ratio and corresponding angles are equal

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step-by-step explanation:

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