Answer:
D. 11.6 cm
Step-by-step explanation:
The missing length of the right angled triangle can be calculated using Pythagorean Theorem as shown below:

Where,
a = x cm
b = 11 cm
c = 16 cm
Thus:






(nearest tenth)
Hi again! so vertical angles are angles that are across from eachother, so it would be 5 and 7 and 6 and 8
The expression is 5x - 2y
Use PEMDAS and work out the rest
x = 3 and y = 4
5 x = 5 x 3 = 15
2 y = 2 x 4 = 8
15( x ) - 8 (y) = 7
The answer is 7
Hope This Helps You!
Good Luck Studying :)