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Leona [35]
3 years ago
11

Zach has $8.15 in his pocket. The money is in quarters and dimes. There are a total of 53 coins. How many quarters and dimes doe

s Zach have in his pocket?
Mathematics
1 answer:
densk [106]3 years ago
3 0

Answer:

34 dimes

19 quarters

Step-by-step explanation:

815=25x+10y

-1325=-25x+-25y

-510=-15y

510=15y

510÷15=y

34=y

53-34=x

19=x

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The responsess to the given question can be defined as follows:

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As per the given info we draw the tree diagram which is defined in the attachment file.

P ( test \ is\  positive ) = P( medication \ used ) \times P( Test \ positive | medication \ used ) + P( medication not \ used ) \times  P( Test\ positive | medication \ not \ used )

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P( medication \ used | test\ positive )= \frac{\textup{P( medication used ) *P( Test positive given medication  used )}}{\textup{P( medication used )}}  

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