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3 years ago

How much pure alcohol must be added to 400 ml of a 15% solution to make its strength 32%

1 answer:

6 0

Quantity of alcohol =400*15/100 = 60ml
x is pure alcohol which must be added : (x + 60)/(x + 400) = 32/100
100x + 6000 = 32x + 12800 => 68x = 6800 => x = 100
100ml pure alcohol must be added

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Stella graphs the equation y=1/3x – 2

faltersainse [42]

we have

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Statements

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The statement is True

Because, this is a linear equation (see the attached figure)

case B) The line passes through the origin.

The statement is False

Because the point $(0,0)$ is not a solution of the equation

Verify

Substitute the value of x and y in the equation

$0=\frac{1}{3}*0-2$

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the point $(0,0)$ is not a solution

therefore

The line does not pass through the origin

case C) The line passes through the point $(0,-2)$

The statement is True

Because the point $(0,-2)$ is a solution of the equation

Verify

Substitute the value of x and y in the equation

$-2=\frac{1}{3}*0-2$

$-2=-2$ ------> is true

the point $(0,-2)$ is a solution

therefore

The line passes through the point $(0,-2)$

case D) The slope of the line is $3$

The statement is False

Because, the slope of the line is $m=\frac{1}{3}$

case E) The y-intercept of the line is $2$

The statement is False

we know that

The y-intercept is the value of y when the value of x is equal to zero

For $x=0$

find the value of y

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the y-intercept is equal to $-2$

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3 years ago

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alexandr402 [8]

She has 445 left after the bear ate some so
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3 years ago

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Natali5045456 [20]

Answer:

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Step-by-step explanation:

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2 years ago

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uranmaximum [27]

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So range y >= - 5

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in the town of pleasant hill there is an average of 16 sunny days each month. write an expression to represent the approximate n

denis23 [38]

32 divided by 2 would equal 16 sunny days.

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