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QveST [7]
3 years ago
11

Find the area of a regular pentagon with a side length of 5 cm. Round to the nearest tenth.

Mathematics
1 answer:
andrew-mc [135]3 years ago
8 0

30

Step-by-step explanation:

the real answer is 25 but if we round up to the nearest 10th the answer would be 30

You might be interested in
Plot the approximate values of and on a number line and determine which of the following statements are correct.
Vika [28.1K]

9514 1404 393

Answer:

  • square root of 5 is approximately 1 less than square root of 10
  • square root of 10 is between 3.1 and 3.2
  • square root of 10 is less than 3.5

Step-by-step explanation:

√5 and √10 are plotted on the number line shown below.

Rounded to 1 decimal place, √5 ≈ 2.2 and √10 ≈ 3.2, so it could be said they differ by about 1 unit. The above answer choices are the ones that match the graph.

8 0
3 years ago
A display of cans in a grocery store consists of 15 rows. There are 45 cans on the bottom , 42 cans on the next row, and so on,
Alchen [17]

Answer:

n = 9

Step-by-step explanation:

20 + 18 + ... + 6 + 4

---------------------------

a = 20 ; d = -2 ; n = ?

--------

4 = 20 + (n-1)(-2)

-16 = (n-1)(-2)

---------

n-1 = 8

n = 9

-------

S(9) = (9/2)(20+4)

S(9) = 4.5*24

S(9) = 108

8 0
4 years ago
Write \sqrt{-27} <br> −27<br> ​ <br> in simplest radical form.
N76 [4]

Answer:

im not sure if sqrt of -27 by it self or over -27 but anyways.

sqrt{-27} = 3i(sqrt)3

sqrt{-37}/(-27) = - i(sqrt)3/9

7 0
3 years ago
Tickets to the movies are $7 for adults and $4 for children. If 272 tickets
rewona [7]

Answer:

202 tickets for adults were sold and 70 tickets for children are sold.

Step-by-step explanation:

Solve this question using simultaneous linear equation.

•Let the number of tickets sold for adults be a

•Let the number of tickets sold for children be b

The question stated that 272 tickets were sold altogether. So:

a + b = 272

Now, make sure that only one of the unknown values remain on the left hand side. For example:

a = 272 - b

I will refer to the above equation as equation 1.

Now, the question also stated that the tickets sold $1694. This means that:

7a + 4b = 1694

I will refer to this equation as equation 2.

Now, substitute equation 1 into equation 2 by replacing the a in equation 2 with the values on the right hand side in equation 1. For example:

7(272 - b) + 4b = 1694

Then just solve the equation by finding the value of b.

7(272 - b) + 4b = 1694 \\ 1904 - 7b + 4b = 1694 \\ 1904 - 3b = 1694 \\ 1904 - 1694 = 3b \\ 210 = 3b \\ b = 210 \div 3 \\  = 70

Lastly, find the value of a. Just take the value of b and then substitute into equation 1.

a  = 272 - b \\  = 272 - 70 \\ a = 202

4 0
3 years ago
Luisa reads 2 pages of her book every minute. At this rate, how many hours will it take for her to read 300 pages? (60 minutes =
sergeinik [125]
2 pages per minute
300/2 =150 minutes into hours that is 2 hours and 30 minutes which directly into hours is 2.5 hours
7 0
3 years ago
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