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Lelechka [254]
3 years ago
12

The organizers of the concert arranged 390 chairs in a row so that there were 18 chairs in the first row and 42 chairs in the la

st row, and the number of chairs in the rows forms an arithmetic progression. How many chairs were placed in rows, and how many chairs in each subsequent row are more than the previous one?
Mathematics
1 answer:
Step2247 [10]3 years ago
5 0

Answer:

4

Step-by-step explanation:

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What is the total surface area of a cylindrical tank having
UkoKoshka [18]

Answer:

Could be C) or D) None of these, 29688.05cm^2

Step-by-step explanation:

Did the question to round off to any numbers?

Formula for cylinder's T.S.A: 2 π r h + 2 π r^2

Diameter= 2 x radius

Radius = 70cm / 2 = 35cm

Height -> need to convert m to cm -> 100cm

Substitute these values into the formula:

2 x π  x 35 x 100 + 2 x π x (35)^2 = 29688.05cm^2

8 0
3 years ago
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cricket20 [7]

Answer:

Scalene acute triangle

Step-by-step explanation:

And acute has less than 90 degrees all of them are less than 90 which makes it acute, scalene

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lianna [129]
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Setler79 [48]

Answer:

9 · x - 16

Explanation:

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Put them together: 9 · x - 16

7 0
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I need help with one more and can you explain how it works too thank you
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The answer to this question is 5.2

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