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1 year ago

Geometry please help (pentagons)

Mathematics

1 answer:

SashulF [63]1 year ago

3 0

Answer:

144

Step-by-step explanation:

540 degrees is the sum of angles in a pentagon

Divide 540 by 5(number of sides) =108(interior angle)

Since there are two pentagons you do 108 X 2 = 216 degrees

Do 360 - 216 = 144

so your answer is right

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The sum of 22 and n is equal to 45.13

Ber [7]

Answer:

23.13

Step-by-step explanation:

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2 years ago

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Tju [1.3M]

Answer:

See Explanation

Step-by-step explanation:

Given

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2 years ago

iren2701 [21]

Answer:

Step-by-step explanation:

Given:

A. $2x^3-x^{2} -6x$

B. $2x^3+8x+4$

C. $3x^4+x^{2} +x-7$

D. $3x^4-3x^{2} +5x-7$

Now, let us evaluate the given expressions one by one.

$(4x^3-4+ 7x)-(2x^3-x-8)\\\Rightarrow 4x^3-4+ 7x-2x^3+x+8\\\Rightarrow 2x^3+8x+ 4$

It is equation B.

So, $(4x^3-4+ 7x)-(2x^3-x-8)$ is equivalent to B.

$(-3x^2+x^4+x)+(2x^4-7+4x)\\\Rightarrow -3x^2+x^4+x+2x^4-7+4x\\\Rightarrow3x^4-3x^{2} +5x-7$

It is equation D.

So, $(-3x^2+x^4+x)+(2x^4-7+4x)$ is equivalent to D.

$(x^{2} -2x)(2x+3)\\\Rightarrow 2x^3-4x^{2} +3x^{2} -6x\\\Rightarrow 2x^3-x^{2} -6x$

It is equation A.

So, $(x^{2} -2x)(2x+3)$ is equivalent to A.

So, answer is:

8 0

3 years ago

Solve 2x² - 16x + 44 = 0 by completing the square method. O x = -3 or x = -8 O x = 16 or x = -6 O x = -4 or x = -18 x O no real

neonofarm [45]

O no real solutions

hope it's helpful

5 0

2 years ago

The standard deviation in the pressure required to open a certain valve is known to be sigma equals 0.6 psi. Due to changes in t

mash [69]

( a ) The null hypothesis, represented by $H_{0}$ , should be equivalent to 0.6 pounds per square inch, considering it normally is predicted to be equivalent to the population parameter, which, in this case, is 0.6 psi ( pounds per square inch. ) The alternative hypothesis on the other hand contradicts the null hypothesis, and as the manager feels the pressure has been reduced, the alternative hypothesis points that the pressure is less than 0.6 psi -

$H_0: stigma = 0.7,\\H_a: stigma < 0.7$

<em>stigma is represented by the sign ( σ )</em>

( b ) Now if you were to reject the null hypothesis when true, that would lead to a type I error. That would mean that to reject the fact that σ = 0.7, and accept that σ < 0.7, even though σ = 0.7 is true, would make a type I error.

_______

( c ) A type II error is quite the opposite. Accepting the null hypothesis while rejecting the alternative hypothesis would make a type II error.

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2 years ago