Think the answer is C or A i think its C though
Answer:

Step-by-step explanation:

Firstly, we've to interchange the variables.

Solving for y

Adding 3 to both sides

Multiplying 2 to both sides

Taking cosine on both sides

Dividing both sides by y

Replace y by 
=> 
Answer: x=20
Step-by-step explanation:
The two angles are vertically opposite so they are equal to each other
7x-99=2x+1
5x=100
x=20
Step-by-step explanation:
Area of triangular prism =1/2 ×base×height
550=1/2×22×h
h=550/11
h=50m
hope it helps.