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Ahat [919]
2 years ago
6

A large container holds 14 litres of a solution which is 25% antifreeze, the remainder being water. How many litres of antifreez

e must be added to the container to make a solution which is 30% antifreeze? NOTE: Only put number, DO NOT PUT any units or sentences.
Mathematics
1 answer:
frutty [35]2 years ago
5 0

Answer:

2.8 liters

Step-by-step explanation:

So there are various ways to do this problem, this is just MY preferred way.

Since we are given 1/4th of a total value with 14 liters, we can actually make this 4/4 by multiplying our given value by 4. In this case, 14 liters for 25% becomes 56 liters for 100% antifreeze.

Since we know have a percent of 100%, we can proceed to take 10% increments, all the way up to 30%

10% is 5.6, multiplied by 3 is 16.8

While you might want to put 16.8 instantly, don't forget we are looking for how much is ADDED from 25%, not just how much there is.

In this case, subtract 14 from 16.8 to come out with a grand total of 2.8 liters added.

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Firlakuza [10]

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3 years ago
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The length of a board is 30.75 inches. Bradley cut the board into 3 smaller pieces that were all the same length. Which expressi
Harman [31]

Answer:

The length of each smaller piece, l=L/n inches

Step-by-step explanation:

This can be expressed as;

Total length=Length per piece×number of pieces

where;

The total length=L

length per piece=l

number of pieces=n

Substituting in the equation;

L=l×n

To get the length of each smaller piece;

l=L/n inches

solving;

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5 0
3 years ago
PLEASE HELP! I need answers ASAP!
Dafna11 [192]

Answer:

6.32

Step-by-step explanation:

Also known as 2√10

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we then focus on these numbers here

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