Answer:
The magnitude of the given vector is 40.72 units.
Step-by-step explanation:
The given vector is 
We know that for any vector 'r'
the magnitude is given by

Comparing with the given vector we have
x = -3
y = 40
z = 7
Thus the magnitude equals


The vertex is (-1,0). you can find this after putting the equation in standard form by completing the square.
Answer:
-6
Step-by-step explanation:
14x+6=2(5+7x)
14x+6=10+14x
14x-14x=10-16
x= -6
Answer:
189
Step-by-step explanation:
ratio is 8:9
multiply ratio by 21 to get 168:189