The sum of the first n odd numbers is n squared! So, the short answer is that the sum of the first 70 odd numbers is 70 squared, i.e. 4900.
Allow me to prove the result: odd numbers come in the form 2n-1, because 2n is always even, and the number immediately before an even number is always odd.
So, if we sum the first N odd numbers, we have

The first sum is the sum of all integers from 1 to N, which is N(N+1)/2. We want twice this sum, so we have

The second sum is simply the sum of N ones:

So, the final result is

which ends the proof.
Answer
The answer is in the step by step explanation
Step-by-step explanation:
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Answer:
13
Step-by-step explanation:
To get equivalent decimals you times the decimal by a number for example 2
9.1x2= 18.2
or times it by 3
9.1x3= 27.3
the answers are 18.2 and 27.3 and obviously other ones to...
i hope this helped :)
Answer:
<h2>-38</h2>
Step-by-step explanation:

Follow the PEDMAS order of operation
Add and subtract left (left to right )
