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3 years ago

Find the sum of the angles of a 12 sided polygon

1 answer:

4 0

The formula for the sum of the interior angles of a polygon is equal to (n-2)*180. the polygon has 12sides, so the sum of the interior angles of the polygonis equal to (12-2)*180 = 10*180 = 1800 degrees.

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2(1 − x) = 9(1 + 2x) + 52(1 − x) = 9(1 + 2x) + 5

marusya05 [52]

Solving the equation $2(1-x) = 9(1 + 2x) + 5$ we get $x=-\frac{3}{5}$

Step-by-step explanation:

We need to solve the equation $2(1-x) = 9(1 + 2x) + 5$ and find value of x

Solving:

$2(1-x) = 9(1 + 2x) + 5\\2-2x=9+18x+5\\Adding\,\,-18x\,\,on\,\,both\,\,sides:\\2-2x-18x=9+5\\Adding\,\,-2\,\,on\,\,both\,\,sides\\-20x=14-2\\-20x=12\\x=\frac{12}{-20}\\x=-\frac{3}{5}$

So, solving the equation $2(1-x) = 9(1 + 2x) + 5$ we get $x=-\frac{3}{5}$

Keywords: Solving Equations

Learn more about Solving Equations at:

#learnwithBrainly

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3 years ago

AABC is reflected across the x-axis. What is the new location of point B? A (-4, -2) C (4, -2) B (-4,2) D (4,2)

Molodets [167]

Answer:

D (4,2)

Step-by-step explanation:

you just change the y value to the opposite sign hehe

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2 years ago

What is probability.

Masteriza [31]

Answer:

Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true

Step-by-step explanation:

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3 years ago

Please help me with this question!

vazorg [7]

It’s C,
Hope it helps,
Message me if you want explanation,
Can I get brainliest answer

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2 years ago

The cereal box shown below is a rectangular prism. Find the surface area of the cereal box. \text{ cm}^2 cm 2 start text, space,

kogti [31]

Answer:

1070 cm.

Step-by-step explanation:

Its correct for Khan Academy:)

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3 years ago

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