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Tasya [4]
3 years ago
8

I need help I am lost please help me

Mathematics
1 answer:
Evgen [1.6K]3 years ago
4 0

Answer:

6

Step-by-step explanation:

Because 6 is 6 times as 1, 12 is 6 times as 2, 18 is 6 times as 3 and so on.

You might be interested in
The set of the consecutive odd numbers 1, 3, 5, 7, ... , N has a sum of 400. How many numbers are in the set?
Amanda [17]

Well, we could try adding up odd numbers, and look to see when we reach 400. But I'm hoping to find an easier way.

First of all ... I'm not sure this will help, but let's stop and notice it anyway ...
An odd number of odd numbers (like 1, 3, 5) add up to an odd number, but
an even number of odd numbers (like 1,3,5,7) add up to an even number.
So if the sum is going to be exactly 400, then there will have to be an even
number of items in the set.

Now, let's put down an even number of odd numbers to work with,and see
what we can notice about them:

         1, 3, 5, 7, 9, 11, 13, 15 .

Number of items in the set . . . 8
Sum of all the items in the set . . . 64

Hmmm.  That's interesting.  64 happens to be the square of 8 . 
Do you think that might be all there is to it ?

Let's check it out:

Even-numbered lists of odd numbers:

1, 3                                   Items = 2, Sum = 4
1, 3, 5, 7                           Items = 4, Sum = 16
1, 3, 5, 7, 9, 11                 Items = 6, Sum = 36
1, 3, 5, 7, 9, 11, 13, 15 . . Items = 8, Sum = 64 .

Amazing !  The sum is always the square of the number of items in the set !

For a sum of 400 ... which just happens to be the square of 20,
we just need the <em><u>first 20 consecutive odd numbers</u></em>.

I slogged through it on my calculator, and it's true.

I never knew this before.  It seems to be something valuable
to keep in my tool-box (and cherish always).


3 0
3 years ago
Which of the following is an example of the atmosphere interacting with the biosphere?
Vilka [71]

I’d say option 4

However, one may think option 3 might be possible as well. But that it is not interacting, it’s affecting.

So I’d stick with option 4.

Good luck!

6 0
3 years ago
Read 2 more answers
Help pls I’ll give brainliest
kondor19780726 [428]

Answer:

7*7n=49n

-6V

-9*6n= -54n

-5k*-9=45k

-8*3b= -24b

double negative 6x answer 6x

-10*2a= -20a

-4*7p= -28p

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A=1/2b and 3b:4c, find a:c<br> Can anyone help?
Hitman42 [59]

Answer:

3a: 2c

Step-by-step explanation:

a= \frac{1}{2}b \\2a= b\\\\

6a = 3b\\3b : 4c \\6a :4c\\\\=\\3a : 2c

6 0
3 years ago
Please helllppppp ....thx if u do​
soldier1979 [14.2K]
Answer

Complete the sentence

There were 240 more people shopping in 2019 than 2020
7 0
3 years ago
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