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prohojiy [21]
3 years ago
14

The diameter of a circle is 8 centimeters what is the circles area

Mathematics
2 answers:
Rina8888 [55]3 years ago
6 0

Answer:

50.27

Step-by-step explanation:

You split 8 in half to find radius, and multiply that by pi.

aleksandr82 [10.1K]3 years ago
5 0

Answer:

50.27

Step-by-step explanation:

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Given an arithmetic sequence with a3=5 and a5=19, find the 24th term.
krok68 [10]

The 24th term is 152

Step-by-step explanation:

The formula of the nth term of an arithmetic sequence is:

a_n=a+(n-1)d , where

  • a is the first term
  • d is the common difference between consecutive terms

The third term means n = 3

∵ a_3=a+(3-1)d

∴ a_3=a+2d

∵ a_3 = 5

- Equate the right hand sides of the third term

∴ a + 2d = 5 ⇒ (1)

The fifth term means n = 5

∵ a_5=a+(5-1)d

∴ a_5=a+4d

∵ a_5 = 19

- Equate the right hand sides of the fifth term

∴ a + 4d = 19 ⇒ (2)

Now we have a system of equations to solve it

Subtract equation (1) from equation (2) to eliminate a

∴ 2d = 14

- Divide both sides by 2

∴ d = 7

- Substitute the value of d in equation (1) to find a

∵ a + 2(7) = 5

∴ a + 14 = 5

- Subtract 14 from both sides

∴ a = -9

The twenty fourth term means n = 24

∵ a = -9 and d = 7

- Substitute the values of a and d in the formula of the nth term

∴ a_24=-9+(24-1)(7)

∴ a_24=-9+(23)(7)

∴ a_24=-9+161

∴ a_24=152

The 24th term is 152

Learn more:

You can learn more about the arithmetic sequence in brainly.com/question/7221312

#LearnwithBrainly

5 0
3 years ago
Is the solutipn shown below correct? Explain. 9x+2=8x^2+6x
marin [14]

Answer:

the answer is not correct

there is a sign error under the radical

it should be 3^2 - 4(-8)(2) = sqrt(73) not sqrt(55i)

Step-by-step explanation:

3 0
3 years ago
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Nikitich [7]
<span>9x^2 - 12x + 12
Hope it helps! (:</span>
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3 years ago
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Mrs. Anders gave her class 15 minutes to read. Courtney read 8 ½ pages in that time. At what rate, in pages per hour, would Cour
arlik [135]

Answer:

34

Step-by-step explanation:

15 mins is 1/4 od an hour so mulitply 8 1/2 (8.5) x 4

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3 years ago
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20 POINTS PLS HELP ASP
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Answer:

Im thinking it is 50

Step-by-step explanation:

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