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lilavasa [31]
1 year ago
10

100 POINTS!!!!! WILL GIVE BRAINLIEST!!!!!! PLS HELP ASAP!!!!!!!

Mathematics
2 answers:
Olin [163]1 year ago
7 0

Answer:

1,600 seats in the theater

Step-by-step explanation:

well it seems like each row is being increased by 8 seats each time.

we start with 4 seats in the 1st row. 12 in the 2nd. and 20 in the 3rd. I will make a chart showing you how many seats are in each row.

4th row - 28  5th row - 36   6th row - 44   7th row - 52   8th row - 60   9th - 68   10th - 76   11th - 84    12th - 92   13th - 100    14th - 108   15th - 116   16th- 124    17th - 132   18th - 140    19th - 148    20th - 156

if we add these all together you will get 1,600

sdas [7]1 year ago
7 0

Answer:

1600 seats

Explanation:

1st row = 4 seats, 2nd row = 12 seats, 3rd row = 20 seats

This is arithmetic progression with first term (a) being 4 and common difference (d) of 8 and total term (n) of 20.

Sum of arithmetic series:

\sf S_n = \dfrac{n}{2}  ( 2a + (n-1)d)

insert values

\sf S_{20} = \dfrac{20}{2}  ( 2(4) + (20-1)8)

\sf S_{20} = 1600

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Estimate using a rate per 100 of 74% of 315. 89% of 195
LiRa [457]
<span><span>1.       </span>Given numbers:
74 % of 315
89% of 195

now, let’s solve the first given numbers:
=> 74% of 315
=> 315 is the 100%
Let’s convert 74% into decimals
=> 74% = .74
=> 315 * .74 = 233.1, the value of 74% of 315
Let’s solve the second given:
=> 89% of 195
where 195 is the 100%
=> 89% = .89
=> 195 * .89
=> 173.55, the value of 89% of 195</span>



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3 years ago
What is the area of the figure?
mash [69]

Check the picture below.

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3 years ago
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12, 15. -27. What is the sum of the cards she chose?
diamong [38]

Answer:

Add 12 with 15, we would get 27

If we add 27 with -27, then we would get 0, because if a negative and positive number are the same, then you add them, you will alway's get 0

0 is your answer

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