The value of k is 60
131 - 11 = 120
120/2 = 60
hope this helped !
Answer:
x = 3
Step-by-step explanation:
2x - y = 4
x + y = 5
y = 5 - x
2x - (5 - x) = 4
2x + x - 5 = 4
3x = 9
x = 3
Answer:
Scalene is the right option.
Step-by-step explanation:
A scalene triangle has all its sides of different lengths.
Answer: A
(He has the side lengths in the wrong place in the cosine ratio)
