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10 months ago

Help please asap!! A- z=15 B- z= 20 C- z=23 D- z=41

Mathematics

1 answer:

grigory [225]10 months ago

4 0

Answer:

z = 15

Step-by-step explanation:

The sum S of the interior angles of a regular polygon is given by the formula

S = (n-2) x 180 where n is the number sides

Here n = 9

So S = (9-2) x 180 = 7 x 180 = 1,260

There are 9 interior angles and each angle is (5z + 65)

So the sum of all 9 interior angles = 9 (5z + 65)

= 45z + 585

Set these equal to each other and solve for z

45z + 585 = 1260

45z = 675

z = 675/45 = 15

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s344n2d4d5 [400]

The greatest common factor is 28.

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Then the greatest common factor is 28.

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3 years ago

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Step-by-step explanation:

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3 years ago

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allochka39001 [22]

Answer:

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Step-by-step explanation:

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(1,3) (3,9)

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2 years ago

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Advocard [28]

Answer:

$\frac{n^{2} - 1 }{2}$

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Step-by-step explanation:

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$\frac{1}{2} \times (n - 1)(n + 1)$

$\frac{( {n}^{2} + n - n - 1) }{2 }$

$\frac{ {n}^{2} - 1 }{2}$

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2 years ago

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Studentka2010 [4]

Answer:

Step-by-step explanation:

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2 years ago