53x2=106
250-106= 144
144/2=72
The length is 72cm
The only numbers that are 4 units from -2 would be 2 and -6. Hope this helps!
You can either ask "How much is left when you take 3 away from 12?", or you can ask "How far apart are the numbers 12 and 3 on the number line?"
Another way you could think about it is "what number do I have to add to 3 to get to 12?"
Let R be the event that a red card is drawn. There are two red suits of 13
cards each, so there are 26 ways of getting are red card. There are 52 cards
altogether, so the probability of getting a red card is
P(R) = 26
52
=
1
2
.
http://www.math.ttu.edu/~drager/Classes/02Spring/m1430/anse3.pdf
