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4 years ago

Find the value of x. Then find the angle measures of the polygon

Mathematics

1 answer:

yanalaym [24]4 years ago

8 0

Answer: x= 25

Angles = 45, 60, 75

Step-by-step explanation:

(X+20) +3x+60 = 180

(X+20)+3x= 180-60= 120

X+20+3x= 120

X= 25

25 + 20=45

25*3= 75

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Solve this quadratic equation by completing the square.

nadya68 [22]

Answer:

$x=-3+\sqrt{27}\\ x=-3-\sqrt{27}$

Step-by-step explanation:

Let's find our C value for the quadratic equation.

$(\frac{6}{2})^{2} = 9$

That is our C. Since we added 9 to one side, we have to do the same to the other. We get:

$x^{2} +6x + 9 = 18 + 9\\x^{2} +6x + 9 = 27$

Now, lets form the left side as a binomial squared.

$(x+3)^{2} = 27$

Let's square both sides now:

$x+3 = (+/-)\sqrt{27}$

Now, we subtract 3 from both sides to isolate the variable, X:

$x= -3(+/-)\sqrt{27}$

This means that the answers are:

$x=-3+\sqrt{27}\\ x=-3-\sqrt{27}$

I do not understand your answers though. Answer A makes no sense, answer B is 221, answer C is 115, and answer D also does not make sense. If you could clarify this portion, maybe I can help you find your alphabetic answer

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4 years ago

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Assoli18 [71]

It depends on what type of shape. What shape are you trying to find surface area for?

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3 years ago

Explain how using basic facts can help you find 10 X 20 X 30 X 40 mentally

Blababa [14]

Do 1 X 2 X 3 X 4 mentally then add the 4 zeros after your answer

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yKpoI14uk [10]

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