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Sauron [17]
3 years ago
10

The sum of all the 2 digit numbers is .. plz give explanation too​

Mathematics
1 answer:
saw5 [17]3 years ago
3 0

Answer:

4905

Step-by-step explanation:

Sn= \frac{(a_1+a_n)}{2}*n\\\\Sn = \frac{10+99}{2}*90 = 4905

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Answer:

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Step-by-step explanation:

It will take 1/12 the time for the duck to fly 1/12 the distance. Therefore, it will take 3 * 1/12 minutes which is 0.25 (1/4 in fraction form).

Hope this helps :)

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2 years ago
Find the quotient (25c^4+20c^3) 5c
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Find the value of A if the 4-digit number 3A5A is divisible by both 3 and 5.
Arturiano [62]

Answer:

The value of A is 5

Step-by-step explanation:

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  divisible by 3

- Ex: 126 is divisible by 3 because the sum of its digits = 1 + 2 + 3 = 6

  and 6 is divisible by 3

- The number is divisible by 5 if its ones digit is zero or 5

- Ex: 675 is divisible by 5 because its ones digit is 5

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- We are looking for the value of A in the 4-digit number 3A5A which

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∵ A is in the ones position

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∵ A = 0

∴ The number is 3050

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∴ 3050 is not divisible by both 3 and 5

∴ A can not be zero

- Let us try A = 5

∵ A = 5

∴ The number is 3555

∵ The sum of the digits of the number = 3 + 5 + 5 + 5 = 18

∵ 18 is divisible by 3

∴ 3555 is divisible by both 3 and 5

∴ A must be equal 5

* <em>The value of A is 5</em>

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3 years ago
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Answer:

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Step-by-step explanation:

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2 years ago
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Fed [463]

Answer:

33.

Step-by-step explanation:

I assume that the 2 triangles are similar.

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x = (77*24(/56

x = 33.

3 0
3 years ago
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