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raketka [301]
3 years ago
8

What is the measure of an interior angle of a regular 9 sided polygon?

Mathematics
1 answer:
Talja [164]3 years ago
3 0

Answer:

140

Step-by-step explanation:

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Find the slope of the line through the pair of points. A(2, –3), P(2, 9)
Flauer [41]
The slope: m=\dfrac{y_2-y_1}{x_2-x_1}

A(2;-3)\to x_1=2;\ y_1=-3\\P(2;\ 9)\to x_2=2;\ y_2=9\\\\subtitute:\\\\m=\dfrac{9-(-3)}{2-2}=\dfrac{12}{0}!!!

<span>The denominator can not be <span>zero!

Conclusion: The slope is undenfined.
</span></span>
6 0
3 years ago
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What is the value of t=1 ∑³ (4 x 1/2^t-1)
Stels [109]

Answer:

7

Step-by-step explanation:

\sum\limits_{t=1}^{3}(4\cdot(\frac{1}{2})^{t-1})

This is the sum of the first three terms of a geometric sequence, where the first term is 4 and the common ratio is ½.

We can use a formula to find the sum, or, since there's only three terms, we can find the value of each term then add up the results.

4 · (½)¹⁻¹ = 4

4 · (½)²⁻¹ = 2

4 · (½)³⁻¹ = 1

4 + 2 + 1 = 7

4 0
3 years ago
Do you know the inequality? Please explain and show answer :)
DerKrebs [107]
If u have a open circle, then the inequality has no equal sign. But if it is a closed circle, the inequality has an equal sign.
Shading to the left means " less then " .
Shading to the right means " greater then " .

(1) u have an open circle on -7 with shading to the left....
     x < -7

(2) u have a closed circle on 4.5 with shading to the left....
    x < = 4.5 (thats less then or equal)

(3) u have an open circle on -5 with shading to the right...
     x > -5

(4) u have an open circle on 1.5 with shading to the right...
     x > 1.5


4 0
3 years ago
Please help im sorry i dont understand shapes and angles
Musya8 [376]

Answer:

Sorry I can't answer this.

But you may use the protacter to find the angle

6 0
2 years ago
Read 2 more answers
99 POINTS
Alik [6]

Answer:

  -a^2 - a + 12

Step-by-step explanation:

You only need to find the products of the first and last terms to determine the correct answer:

  (-a)(a) = -a^2

  (3)(4) = 12

You're looking for an expression with -1 as the leading coefficient and +12 as the constant. There is only one choice like that:

  -a^2 - a + 12

6 0
3 years ago
Read 2 more answers
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