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Hunter-Best [27]
3 years ago
15

The price of a dress is reduced by 60%.When the dress still does not​ sell, it is reduced by 60% of the reduced price. If the pr

ice of the dress after both reductions is ​$72, what was the original​ price?The price of a dress is reduced by 25​%.When the dress still does not​ sell, it is reduced by 25​% of the reduced price. If the price of the dress after both reductions is ​$72, what was the original​ price?
Mathematics
1 answer:
Nina [5.8K]3 years ago
6 0

Answer:

1. $450

2. $128

Step-by-step explanation:

1. new price = .4 (.4 * original price x)

72 = .16x

x = 450

2. new price = .75 (.75 * original price x)

72 = .5625x

x = 128

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To solve this problem you will need this tool, it is the formula of speed :

<em>speed = distance/time</em>

(I suggest you to remember this one for life, it is a really useful one)

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Let's write what we already know to solve this puzzle :

6 = d / 2.1

Where d is that unknown distance..  So we are in front of an equation here let's solve it :

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Now that we know that distance, for the race, we can see if that poor Jackie Donofrio has all his chances to catch Jann Avery...

We already know his speed... and since we have the distance, we write :

4 = 12.6 / t

Where t is the unknown time, for Jackie, to finish the same race. Let's solve the equation :

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Good Luck

5 0
3 years ago
A study of five hundred adults found that the number of hours they spend on social networking sites each week is normally distri
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Margin of error formula:
ME = z * (Sigma) / √ n
z = 1.96 for a 95 % confidence interval;
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Answer:

The height of the big cone is double the one in the small cone

h2 = 2h1

Step-by-step explanation:

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