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bulgar [2K]
3 years ago
14

Which equation is false for x = 6?

Mathematics
1 answer:
wlad13 [49]3 years ago
8 0

Answer:

choice A.  Since  12 -8 = 4  not 5

Step-by-step explanation:

if we plug in x =6 for  2x -8 = 5

2*6 - 8 =  12 - 8 = 4  not 5

Try B.   3*6 + 7 =   18 + 7 = 25 = 25   true

Try C.   4*6 + 12 = 24 + 12 = 36 = 36  true

Try D.   6*6 - 6 =  36 - 6 = 30  = 30  True

from the Great MysticChaCha

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A scientist needs 10 L of a solution that is 60% acid. She has a 50% acid solution and a 90% acid solution she can mix together
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Allegation is a method to find the ratio in which two or more indignant are mixed to produce a mixture or solution.

The equation represents the total liters of acid that are needed is,

0.5x+0.9y=6

Thus the option 3 is the correct option.

<h3>What is allegation?</h3>

Allegation is a method to find the ratio in which two or more indignant are mixed to produce a mixture or solution.

Given information-

A scientist needs 10 L of a solution that is 60% acid.

The percentage of two acid solution are 50% and 90%.

Variable<em> x</em><em> </em>represent the number of liters of the 50% solution.

Variable<em> y </em>represent the number of liters of the 90% solution.

Quantity of acid from 50% solution is 0.5x liters, and quantity of acid from 90% solution is 0.9x liters.

As the scientist needs 10 L of a solution that is 60% acid. Therefore the quantity of acid in 60 percent acid solution is,

a=10\times\dfrac{60}{100} \\a=6

Thus 6 liters of acid required by the scientist. As to get the 6 liters of acid from 50% and 90 percent solution, we need to add the amount of acid in these solutions.Thus,

0.5x+0.9y=6

This is the required equation.

Hence the equation represents the total liters of acid that are needed is,

0.5x+0.9y=6

Thus the option 3 is the correct option.

Learn more about the mixture and allegation  here;

brainly.com/question/24372098

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