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3 years ago

14

The perimeters of the triangles shown below are equal

2 answers:

natulia [17]3 years ago

8 0

Answer:

$x=19$

Step-by-step explanation:

The perimeter of a shape is the sum of all of its side lengths. Therefore, the perimeter of the first triangle is $x-7+x-7+x-7=3x-21$ and the perimeter of the second triangle is $9+15+12=36$ .

We are given that the perimeters of the triangles are equal, so $3x-21$ equals $36$ . As an equation, that would be $3x-21=36$ . Solving for $x$ , we get:

$3x-21=36$

$3x=57$ (Add $21$ to both sides of the equation to isolate $x$ )

$x=19$ (Divide both sides of the equation by $3$ to get rid of $x$ 's coefficient)

Hope this helps!

Naya [18.7K]3 years ago

6 0

Answer:

x=19

Step-by-step explanation:

The perimeter of the right triangle is

P=9+12+15 =36

The perimeter of the left triangle is

P =x-7+ x-7+ x-7 = 3x-21

Set them equal

36 = 3x-21

Add 21 to each side

36+21 = 3x-21+21

57 = 3x

Divide each side by 3

57/3 = 3x/3

19 =x

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lesya692 [45]

Answer:

The amount of jobs from fitting industry shall decline in 5.5 percent from 2015 to 2025.

Step-by-step explanation:

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Where:

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If $n_{o} = 546.5$ , $t = 2025-2015 = 10\,years$ and $\frac{\Delta n}{\Delta t} = -3\,\frac{1}{years}$ , then:

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$n = 516.5$

The percent change in jobs from pipe fitting industry is calculated as follows:

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The amount of jobs from fitting industry shall decline in 5.5 percent from 2015 to 2025.

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3 years ago

A is (-2,-5) A’is a glide relection where the translation is (x,y) Is(x+7,y) the line of reflection is y=2 What are the coordina

erma4kov [3.2K]

Answer: A' (5,9)

Step-by-step explanation:

1. You have that the translation is $(x,y)$ ⇒ $(x+7,y)$ and the coordinates of A is (-2,5). Then:

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2. As you can see, -5 is 7 units below of the line of reflection $y=2$ , therefore, you can know the coordinates of A' as following:

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lord [1]

Answer:

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Romashka [77]

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Step-by-step explanation:

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3 years ago