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JulijaS [17]
3 years ago
12

Write the series using summation notation. 9 + 29 + 129 + …

Mathematics
1 answer:
Sveta_85 [38]3 years ago
4 0

Step-by-step explanation:

We can see that this adds by 20, then 100, and so on. Furthermore, it starts at 9, so we can write this as

∑9+20n

The 9 is because we start with 9, and we have a multiplier of 20, so we put the 20 in there as so. On the bottom of the sum notation, we should have n=1 (as when we plug that in, it's our first number) and at the top you can put a variable k as we don't know the maximum. I don't think I can put numbers at the bottom and top of the sum using the tools I have, so that's why I wrote it out

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The figure is a circle with center O.
STatiana [176]

<u>Given</u>:

Given that the circle with center O.

The radius of the circle is OB.

The chord of the circle O is PQ and the length of PQ is 12 cm.

We need to determine the length of the segment PA.

<u>Length of the segment PA:</u>

We know that, "if a radius is perpendicular to the chord, then it bisects the chord and its arc".

Thus, we have;

PA=\frac{PQ}{2}

Substituting the value PQ = 12, we get;

PA=\frac{12}{2}

PA=6 \ cm

Thus, the length of the segment PA is 6 cm.

Hence, Option d is the correct answer.

3 0
2 years ago
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VashaNatasha [74]

Answer:

The correct option is;

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Step-by-step explanation:

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3 years ago
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denis-greek [22]

Answer:

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Step-by-step explanation:

7 0
2 years ago
If the students finished their assignment at 1:30 and they had been working for an hour and 45 minutes, what time did they start
bekas [8.4K]

Answer:

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Step-by-step explanation:

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3 years ago
Contains the origin and is parallel to the line 3x-2y=12
scoray [572]
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6 0
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