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weqwewe [10]
3 years ago
9

Solve for x and y x-y=11 2x+y=19

Mathematics
2 answers:
Ilia_Sergeevich [38]3 years ago
7 0
X=10 y=-1
U can use Photomath for questions like this
Charra [1.4K]3 years ago
6 0

Answer:

x = 10

y = -1

Step-by-step explanation:

System of equations

x - y = 11

2x + y = 19

What is x and y?

To solve this, we need to find a way we can substitute one equation into another. Let's try the first equation.

x - y = 11

Add y to both sides :

x = 11 + y

Now substitute x from the first equation into x in the second equation :

2(11 + y) + y = 19

Distribute :

22 + 2y + y = 19

Add like terms :

22 + 3y = 19

Get y alone :

Subtract 22 from both sides :

3y = -3

Divide 3 from both sides :

y = -1

Now that we have y, let's substitute it into the easier equation, which would be the first one.

x - (-1) = 11

x + 1 = 11

Subtract 1 from both sides :

x = 10

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1) 8- 3x

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What is the greatest number of rectangles 6cm x 4cm that can be cut from a piece of metal measures 16 cm x 20 cm?
Dominik [7]
Answer:

The greatest number of rectangles that can be cut from the piece of metal = 12

Explanation:

The dimension of the piece of metal = 16cm x 20cm

That is:

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Width of the rectangle = 4cm

The diagram below illustrates how the rectangles can be cut from the piece of metal

Considering the diagrams drawn above, and counting the rectangles formed, we can conclude that the greatest number of rectangles will be cut using the approach on the left, hence the greatest number of rectangles that can be cut is 12

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1 year ago
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Answer:

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Step-by-step explanation:

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4:3=7\\?:?=84\\84/7=12\\

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So basically, You make a "equation".

You add 4 and 3 which is 7.

So since you know there is 84 total cards. That will equal the "?". So you divide the 84 and 7 since that will show what you will multiply with 4 and 3 to keep the blue and cards equally balanced. So you multiply the 12 and 4. Which is 48.

So there are 48 blue cards. Hope this helped you C:

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