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S_A_V [24]
3 years ago
13

Which of the following represents "10 less than n"? 10 - n n - 10 -10n

Mathematics
1 answer:
Ivan3 years ago
5 0
N-10 because you want to take 10 away from n
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I need help is anyone is out there and knows how to do this help.<br> HELP ASAP
Anna [14]

Answer:

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Step-by-step explanation:

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4 0
3 years ago
Plz help with this word problem
Andreyy89
He will mix some 20% solution and some 70% solution to make 60% solution.

Let x = number of liters of 20% solution.
Let y = number of liters of 70% solution.

He wants to make 50 liters of 60% solution, so

x + y = 50   First Equation

The amount of acid in x amount of 20% solution is 20% of x, or 0.2x
The amount of acid in y amount of 70% solution is 70% of y, or 0.7y
The amount of acid in 50 liters of 60% solution is 60% of 50 liters, or 0.6 * 50 = 30
Now we add the amounts of acid.
0.2x + 0.7y = 30   Second Equation

x + y = 50
0.2x + 0.7y = 30

-0.2x - 0.2y = -10
0.2x + 0.7y = 30
------------------------
           0.5y = 20

y = 40

x + y = 50

x + 40 = 50

x = 10

Answer: He needs 10 liters of 20% solution and 40 liters of 70% solution.
4 0
3 years ago
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This is hey confusing because I didn't go to school when they gave a lesson about this so please help.
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