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kompoz [17]
3 years ago
11

The first row of a section in a concert hall has 20 seats. The second row has 21 seats. The third row has 22 seats. This pattern

continues and this section has 12 rows. How many seats are in this section?
Mathematics
2 answers:
pentagon [3]3 years ago
8 0

Answer:

The correct answer is 306. I took the test.

aivan3 [116]3 years ago
5 0

To solve this problem you must apply the proccedure shown below:

1. The arithmetic sequence is:

an=a1+d(n-1)

Where an is the nth termn, a1 is the first term, d is the common difference between the terms and n is the number of the term.

2. Based on the information given in the problem, you have:

a1=20\\ d=1\\ n=12

3. When you substitute these values into the formula, you obtain:

an_{12} =20+(12-1)\\ a_{12}=31

The answer is: 31 seats

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iragen [17]
<h3>Answer:  (4,2)</h3>

==============================================================

Explanation:

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Reflecting over y = 1 lands the point on (0,2) because we move 1 unit up to arrive at the line of reflection, and then we keep going one more unit (same direction) to complete the full reflection transformation. I'll call this point P.

Then we reflect point P over the line x = 2 to arrive at the location Q = (4,2). Note how we moved 2 units to the right to get to the line of reflection, and then keep moving the same direction 2 more units, then we have applied the operation of "reflect over the line x = 2"

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All of this is shown in the diagram below.

4 0
3 years ago
How should 13,079 be written in in expanded form​
Thepotemich [5.8K]

Answer:

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Step-by-step explanation:

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That is how expanded form works.

Hope it helps :)

If you have any questions ask me.

5 0
2 years ago
Read 2 more answers
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