Answer:
There are 32 pupils in the class
Step-by-step explanation:
Let's say there are N pupils in the class. Then each pupil must send N-1 cards - because it would make no sense to send one to themselves! So each of the N pupils send N-1 cards, which becomes 992 cards in total. In equation form, this is
This is a second degree polynomial, which has the solutions
where 
If we insert these numbers in the equation,
If we choose the solution with the minus sign, we get
N=-31
but this makes no sense! There can't be a negative number of pupils in the class!
So we choose the solution with the plus sign,
So there are 32 pupils in the class
You would minus 5 by 45 giving you 40 then 40 divided by 35 but that would come out as a decimal 1.14.
is this all of the question?
Answer:
That's a solid answer there.
Step-by-step explanation:
LOL
In general, you're calculating the magnitude of average velocity. In fact, speed is a vector, and as such it also has a direction and orientation.
So, if you compute the average speed, you're assuming that you went directly from point A to point B, which is basically never the case.
If, instead, you actually moved on a straight line from point A to point B, then the two quantities are the same.
Answer:
Step-by-step explanation:
Do the x-axis then the y-axes thats all i know sorry if i could not help that much
