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Yuliya22 [10]
3 years ago
6

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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How do you factor 30n^2b-87nb+30b?
Rudik [331]
It's not clear whether you meant 30n^(2b) or [30n^2] b.

I will assume the latter.

b can then be factored out of all  three terms, resulting in 

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Can you factor this further?
4 0
3 years ago
Match each system of equations to its graph. y = 2x + 1 y = x + 2 y = 3x y = x + 3 y = 2x − 2 y = x − 2 y = 2x + 3 y = x + 5 y =
GalinKa [24]

The matchup are:

  • (1st picture): y=2x+3 and y=x+5
  • (2nd picture): y=4x+2 and y =3x+2
  • (3rd picture): y=2x+1 and y =x+2
  • (4th picture): 3x and x+3

<h3>What does the graph of an equation shows?</h3>

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:

  • (1st picture): y=2x+3 and y=x+5
  • (2nd picture): y=4x+2 and y =3x+2
  • (3rd picture): y=2x+1 and y =x+2
  • (4th picture): 3x and x+3

Learn more about equations  from

brainly.com/question/2972832

#SPJ1

4 0
2 years ago
What is the standard form of x/4 - y/3 =1 and 5/x - 2/y=7.
kompoz [17]
You can multiply both sides by a number that will get rid of the denominators. For ex. you can multiply the first equation by 12 because 4 and 3 both go into 12 evenly. MAKE SURE YOU MULTIPLY THE OTHER SIDE BY 12 AS WELL! Therefore, 12(x/4) - 12(y/3) = 12(1), or 3x - 4y = 12
5 0
4 years ago
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