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Elodia [21]
2 years ago
12

The choices are

Mathematics
2 answers:
gayaneshka [121]2 years ago
6 0

Answer:

Perimeter = (lenght×2) + (width×2)

Perimeter = (2.5n×2) + (2×(4n+5))

Perimeter = 5n + 8n + 10

Perimeter = 13n + 10

The Answer is D

Ksju [112]2 years ago
3 0

Answer:

13n+10

Step-by-step explanation:

The formula for perimeter of rectangle = 2*(L+B)

L = 4n+5

B = 2.5n

Perimeter = 2 * (4n + 5 + 2.5n)

Perimeter = 2 * (6.5n + 5)

Perimeter = 13n + 10

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<u>Answer</u><u> </u><u>:</u><u>-</u>

Let the side of the square measure a cm, thus, according to the question,

  • New length = 3(a cm)

We know that,

➭ Area ( Square ) = a²

Thus, the area of the square with normal length i.e. a cm, will be,

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Now, by taking the new length, the area will become,

⤳Area = 3a x 3a

⤳ Area = 9a²

Now,

We observe that, if we divide these, we get,

➤ 9a²/a²

( a² will get canceled since its common )

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Hence, Ashley's assumptions are wrong.

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dolphi86 [110]
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velikii [3]

Answer:

x=4

Step-by-step explanation:

Before we find x, we need to set up this triangle a little more. We need to find the triangle's altitude before we can solve for x. We will use the heartbeat method to find the altitude.

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