I don't understand this

Mathematics

1 answer:

marta [7]3 years ago

5 0

We can start off by knowing that perimeter is all the sides added together. That means that (2 1/2 x 2) + ((2 1/2 + x) x 2) = 19.

It would be easier to make this into decimals. 2 1/2 is the same as 2.5. Multiply this by 2 and you get 5.

Now you can do 19 - 5 = 14.

This means the other 2 sides have to equal 14 so you write an equation.

2(2.5 + x) = 14.

When you simplify, you get 5 + 2x = 14.

Subtract 5 from both sides and you get 2x = 9.

Solve for x and you get x = 4.5.

Your answer is x = 4.5

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(1st picture): y=2x+3 and y=x+5
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The graph of the linear equation is known to be one that often brings or set the points that can be found on the coordinate plane and it is one that shows all the solutions to the equation.

Note that when all variables stands for real numbers, a person can be able to use graph to show the equation and this is often done through plotting the points to show a pattern and then link up the points to have all the points.

From the above, the pictures that have all the points as shown on the graph are:

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(2nd picture): y=4x+2 and y =3x+2
(3rd picture): y=2x+1 and y =x+2
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brainly.com/question/2972832

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I don't understand this​

I don't understand this