The sum of 4 consecutive odd numbers is 40. What is the second number in this sequence?
2 answers:
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Answer:
Length of B is 7.4833
Step-by-step explanation:
The vector sum of A and B vectors in 2D is
And its magnitude is:
Where
Using the properties of the sum of two angles in the sin and cosine:
Sustituying in the magnitud of the sum
Solving for B
Sustituying the value of the magnitud of A
Every number will have only 3 digits. In the ones place, there are 5 choices. For every choice of digit made in the ones place, there are 8 possible choices for the hundreds place (you can choose from 1-9, omitting whatever is used in the ones place), and there are 8 possible choices for the tens place (you can choose from 0-9, omitting whatever has already been used elsewhere).
So there are
such numbers.
So there are