I think it's the first 7.
I hope this helps :-)
Answer:
120960
Step-by-step explanation:
Given that a librarian has a set of ten different books, including four different books about Abraham Lincoln.
The librarian wants to put the ten books on a shelf with the four Lincoln books next to each other, somewhere on the shelf among the other six different books.
First arrnage the 6 other books in the shelf.
This can be done in
Now arrange the 4 books of Lincoln
This can be done in
Now we have 7 places to insert Lincoln books including two corners and in between.
Thus this can be done in 7 ways
Total no of ways =
Answer:
√34
Step-by-step explanation:
it would be radical 34.
Answer:
-4a +22b
Step-by-step explanation:
add the ones with same variable
Well if the window is 40 x 10 the L is 52 and the w 22