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3 years ago

Lei had php 150. She spend php 48 for spaghetti and Php 12. For the drinks what percent of her money was left

Mathematics

1 answer:

musickatia [10]3 years ago

7 0

Answer:

She has 60% of money left.

Step-by-step explanation:

You have to find out how much Php that Lei has left :

Php 150 - Php 48 - Php 12 = Php 90

She has a remaining of Php 90. Next, you have to find the percentage by dividing hy original amount and then, multiply by 100 :

(90/150)×100 = (3/5)×100 = 60%

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to arrive at 2000 liters of 60% saline solution the attendant has to mix a 90% and a 40% saline solution. How many liters of eac

CaHeK987 [17]

Answer:

800 liters of 90% saline solution and 1200 liters of 40% saline solution should be used.

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Given:

At 2000 liters of 60% saline solution the attendant has to mix a 90% and a 40% saline solution.

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Let the liters of 90% saline solution mix be $x.$

And let the liters of 40% saline solution mix be $y.$

So, the total number of liters:

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$y=2000-x\ \ \ ....(1)$

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Substituting the value of $y$ from equation (1) we get:

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Subtracting both sides by 800 we get:

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Dividing both sides by 0.5 we get:

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Now, substituting the value of $x$ in equation (1) to get the liters of 40% saline solution:

$y=2000-x$

$y=2000-800$

$y=1200.$

Thus, the liters of 40% saline solution = 1200.

Therefore, 800 liters of 90% saline solution and 1200 liters of 40% saline solution should be used.

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Lei had php 150. She spend php 48 for spaghetti and Php 12. For the drinks what percent of her money was left​

Lei had php 150. She spend php 48 for spaghetti and Php 12. For the drinks what percent of her money was left