Answer:
or 
Step-by-step explanation:
we know that
Applying the law of cosines

In this problem we have



substitute the values



The function f(x) is a function of the variable x.
To solve the function for x = 30, just plug in 30 for x.
14 - 0.5(30) = -1
f(30) = -1
Answer:
4 units
Step-by-step explanation:
Distance like magnitude is simply a positive value
----------------------------
Since the y coordinate is the same
the distance is just the difference in the x coordinates
from -5 to -1 is a distance of 4
I belive it is the second option!
The answer is 216.
https://photomath.net/s/YLLqQX