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makvit [3.9K]
3 years ago
13

For every 9 black and white copies printed there are 2 color copies printed. If there are 200 color copies printed how many blac

k and white copies are printed?
Mathematics
2 answers:
alexandr402 [8]3 years ago
8 0

Answer:

<u>900</u> black and white copies are printed.

Step-by-step explanation:

Given:

For every 9 black and white copies printed there are 2 color copies printed.

If there are 200 color copies printed.

Now, to find the number of black and white copies are printed.

Let the number of black and white copies printed be x.

As given, for every 9 black and white copies printed there are 2 color copies printed.

So, 9 is equivalent to 2.

If there are 200 color copies printed.

Thus, x is equivalent to 200.

Now, to solve by using cross multiplication method:

\frac{9}{2} =\frac{x}{200}

<em>By cross multiplying we get:</em>

1800=2x

<em>Dividing both sides by 2 we get:</em>

900=x

x=900.

Therefore, 900 black and white copies are printed.

djyliett [7]3 years ago
3 0

Answer:

There were 900 black and white copies printed.

Step-by-step explanation:

Given:

For every 9 black and white copies printed there are 2 color copies printed.

2 color copies  = 9 black and white copies

We need to find the number of black and white copies if there are 200 color copies.

solution:

First we will find the number of black and white copies for 1 color copy.

Now we know that;

2 color copies  = 9 black and white copies

1 color copy = Number of black and white copies for 1 color copy.

By Using Unitary method we get;

Number of black and white copies for 1 color copy = \frac{9}{2} = 4.5

Now we can say that;

1 color copy = 4.5 black and white copy

200 color copies =  Number of black and white copies for 200 color copy

Again By Using Unitary method we get;

Number of black and white copies for 200 color copy = 200\times 4.5 = 900

Hence There were 900 black and white copies printed.

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The slope-intercept form given (6,-5) &amp; perpendicular to -5x - 7y = -17.
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Answer:

y=\dfrac{7}{5}x-\dfrac{67}{5}

Step-by-step explanation:

<u>Slope-intercept form of a linear equation:</u>

 y=mx+b

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  • b is the y-intercept.

<u>Rearrange</u> the given equation so that it is in <u>slope-intercept form</u>:

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Therefore, the slope of the given equation is -⁵/₇.

If two lines are <u>perpendicular</u> to each other (at right angles), the <u>product of their slopes</u> will be -1.  Therefore, their slopes will be negative reciprocals of each other.

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\implies -5=\dfrac{7}{5}(6)+b

\implies -5=\dfrac{42}{5}+b

\implies b=-\dfrac{67}{5}

<u>Substitute</u> the found slope and the found value of b into the <u>slope-intercept formula</u> to create the equation for the <u>perpendicular line</u>:

\implies y=\dfrac{7}{5}x-\dfrac{67}{5}

Learn more about slope-intercept form here:

brainly.com/question/27317293

brainly.com/question/27926846

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1 year ago
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