Answer:
=
−
4
Step-by-step explanation:
2
−
2
+
1
=
7
Answer:

Step-by-step explanation:
we know that
The formula of the law of cosines is equal to

where
a, b and c are sides. C is the angle opposite side c
In this context
The formula to calculate the measure of angle X is equal to

substitute the given values

solve for cos(X)






The answer would be 200 because you would solve the equation 5.50+700=9n. Once you do, you end up with 200. And if you plug it in it equals the same.
I think it’s a 7/12, hope your test is done well