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:
±5
Step-by-step explanation:
The double bar around <em>n</em> is absolute value. This means that any number plugged in will turn positive.
Therefore, there are only 2 numbers that can be inputted: -5 and 5.
|-5| = 5
|5| = 5
Maybe your answer is 0.962,
the relationship is that you divided the 962 by 1000
and you get 0.962
962 m=0.962 km
Answer:
Step-by-step explanation:
I'm not sure how to solve the first one, but I'll try to simplify sqrt3-1/sqrt3+1. I simplified it and I got 2-sqrt3. Does that help?
For question 2, I got -0.251.