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julia-pushkina [17]
2 years ago
9

Solve the system of equations using subtraction, 2x - 4y = -4 2x + y = 11​

Mathematics
1 answer:
Ludmilka [50]2 years ago
6 0

Answer:

x=4, y=3; (4,3)

Step-by-step explanation:

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Let x be the <span>heights of a maple tree and y be the height of the cherry tree.
We know: 
</span>\frac{x}{y} = \frac{5}{2}
<span>The new ratio is obtained like this:
</span>\frac{x+20}{y-20} = \frac{3}{1}.
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3 years ago
For every 9 black and white copies printed there are 2 color copies printed. If there are 200 color copies printed how many blac
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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.

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If there are 200 color copies printed.

Thus, x is equivalent to 200.

Now, to solve by using cross multiplication method:

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

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

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8 0
3 years ago
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Step-by-step explanation:

Inside the darkest part where both inequalities are true

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Step-by-step explanation:

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3 years ago
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