D = 180 * (n -2)
D = 180n -360
180n = D +360
n = (D / 180) + 2

So, the answer is "A"
And we can test this with a square, sum of angles = 360
n = (D / 180) +2
n = (360 / 180) +2
number of sides = 4
correct

Source:
http://www.1728.org/polygon.htm

3 0

3 years ago

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What are the steps to simplify 1-2/x-2=x+1/x+2? Plz help ASAP!!!

vichka [17]

Answer:

$-x^3+x^2+x-6=0$

Step-by-step explanation:

Algebra

The equation is shown without proper format, we'll assume the correct equation is like

$\displaystyle 1-\frac{2}{x-2}=x+\frac{1}{x+2}$

Multiplying all the equation by (x-2)(x+2)

$(x-2)(x+2)-2(x+2)=x(x-2)(x+2)+(x-2)$

Operating

$x^2-4-2x-4=x^3-4x+x-2$

Rearranging and simplifying

$\boxed{-x^3+x^2+x-6=0}$

8 0

3 years ago

Darian is multiplying 34 by 12. Use the drop-down menu to complete the statement.

tester [92]

Answer:

408

Step-by-step explanation:

The answer is like adding 34, 12 times. Example:

34+34+34+34+34+34+34+34+34+34+34+34=408

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8 0

3 years ago

Read 2 more answers