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IRINA_888 [86]
3 years ago
7

What is the approximate area of the decagon? Recall that a decagon is a polygon with 10 sides.

Mathematics
2 answers:
JulsSmile [24]3 years ago
8 0

A = 5 / 2 a^2 square root over 5 + 2 square root of 5

hopefully this helps you out

AURORKA [14]3 years ago
4 0

Answer: it’s 188 cm

Step-by-step explanation:

I took the quiz

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A triangle is formed with side lengths of 7 inches,24 inches,and 25 inches.is the triangle a right triangle​
Leokris [45]

Step-by-step explanation:

If the triangle is a right triangle, it will satisfy Pythagorean theorem.

c² = a² + b²

25² = 7² + 24²

625 = 49 + 576

625 = 625

Yes, the triangle is a right triangle.

6 0
3 years ago
The cube of twice a number.
Ksivusya [100]

Answer:

2n^3

Step-by-step explanation:

n^3 represents the cube of the number n; therefore,

"twice the cube of a number" is 2(n^3) or 2n^3

8 0
3 years ago
Someone please helpp
umka2103 [35]

Answer:

The two equations are similar because they both end up with the same common value. 0=0 The work you need to show that this is correct will be shown below.

Step-by-step explanation:

2(5m−4)−3(m−5)2=−3m2+40m−83

Add 3m^2 to both sides.

−3m2+40m−83+3m2=−3m2+40m−83+3m2

40m−83=40m−83

Subtract 40m from both sides.

40m−83−40m=40m−83−40m

−83=−83

−83+83=−83+83

0=0

If you have any questions regarding my answer please tell me in the comments, I will come and answer them. Have a good day.

6 0
3 years ago
A car travels 2 5/8 miles in 3 1/2minutes at a constant speed. Which equation represents the distance, d, that the car travels i
kakasveta [241]

Answer:

Step-by-step explanation:

2⅝ miles/(3½ minutes) = (21/8 miles)/(7/2 minutes) = ¾ mile/minute

d = ¾m = 0.75m

8 0
3 years ago
Sq is an angle bisector m <qst=2x and m <qsr=3x-10 what is <rst
defon
Answer:
∠RST = 40°

Explanation:
We are given that:
SQ bisects angle RST.
This means that:
∠QST = ∠QSR
2x = 3x - 10
10 = 3x - 2x
x = 10

Therefore:
∠QST = 2x = 2(10) = 20°
∠QSR = 3x - 10 = 3(10) - 10 = 30 - 10 = 20°
Note that both angles are equal.

Now, we can get ∠RST as follows:
∠RST = ∠QST + ∠QSR
∠RST = 20 + 20 = 40°

Hope this helps :)
6 0
3 years ago
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