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____ [38]
2 years ago
13

Emily practices piano for 2/3 of an hour on Monday and 1/2 hour on Wednesdays. How many hours does Emily spend practicing piano

in one week?​
Mathematics
1 answer:
Sergeu [11.5K]2 years ago
4 0

Answer:

50 minutes

Step-by-step explanation:

Given:

\bullet \ \ \text{Monday:} \ \dfrac{2}{3} \times \text{Hour}\\\\\bullet \ \text{Wednesday:} \ \dfrac{1}{2} \times \text{Hour}

Since Emily only practiced on Monday and Wednesday, the sum of time on both days is the time Emily practiced on the piano for a week.

\implies \text{Monday + Wednesday = Total time practiced on piano for a week}

<u>Substitute the times in the equation</u>

\implies (\dfrac{2}{3}  \times \text{Hour}) + (\dfrac{1}{2}  \times \text{Hour}) = \text{Total time practiced on piano for a week}

<u>Simplify the equation</u>

\implies (\dfrac{2}{3}  \times 60 \ \text{minutes}) + (\dfrac{1}{2}  \times 60 \ \text{minutes}) = \text{Total time practiced on piano for a week}

\implies (20 \ \text{minutes}) + (30 \ \text{minutes}) = \text{Total time practiced on piano for a week}

\implies \boxed{50 \ \text{minutes} = \text{Total time practiced on piano for a week}}

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Step-by-step explanation:

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LekaFEV [45]

Answer:

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<em><u></u></em>

Explanation:

<u>1. Determine the percent of people who developed dementia from the entire population. </u>

a)<u> From the percent of people who had depression</u>:

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b) <u>From the number of people who did not have depression</u>:

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c) <u>Total percent:</u>

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<u>2. Probability that the person suffered from depression earlier in life, if a person has developed dementia:</u>

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Note, that this can be calculated using the formula for conditional probability:

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Answer:

Hey There!

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<h2>I hope it is helpful to you...</h2><h3>Cheers!_________</h3>
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