Answer:
a. 
Step-by-step explanation:
The given vector is v= 4i - 5j
The magnitude of this vector is;



The unit vector u in the direction of v is;



We rationalize to get

The absolute value of -8 is 8
here’s a trick the absolute value of a positive is the same number of its negative it’s the same number but positive
hope it helps
Answer:
Step-by-step explanation:256
Answer:
X=36
Step-by-step explanation:
3x+72=180
3x=180-72
3x=108
x=36