3rd Option should be correct
150(number of tissues)*20(length of tissues) = 3000cm.(total length)
Then to convert it to meters...
1 meter = 100 cm.
3000 ÷ 100 = 30
So 30 meters of paper is needed.
Does that help?
A+b=9i-8j+7k+(7i-9k)
=9i-8j+7k+7i-9k
=16i-8j-2k
9a+7b=9(9i-8j+7k)+7(7i-9k)
=81i-72j+63k+49i-63k
=130i-72j
|a|=| 9i-8j+7k |
|a-b|=|9i-8j+7k-(7i-9k)|
=|9i-8j+7k-7i+9k|
=|2i-8j+16k|
i hope this is helping
Answer:
c
Step-by-step explanation:
