kmart4062
22.04.2020 •
Mathematics
You have a collection of 7 science fiction books which you would like to arrange on your bookshelf. The number of possible arrangements of 7 books is?
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Ответ:
49
Step-by-step explanation:
you times the amount of possible rearrangements by the total number of items.
Ответ:
Step-by-step explanation:
The distances they jumped were
x,y,z
y=x+2
z=x+2+2=x+4
x+y+z=12.69
x+x+2+x+4=12.69
3x+6=12.69
3x=6.69
x=2.23
So Jack jumped 2.23m, Alex jumped 4.23m, and Amir jumped 6.23m.