Answer:
x is add one y is divide in half
Step-by-step explanation:
18y - 9y = 9y
9y = 45
9y/9 = 45/9
y = 5
hope this helps
Answer:
Figure show demonstration of
and 
Step-by-step explanation:
Let chosen fraction be 
Now we multiply fraction with 
Result will be
= 
= 
Figure show demonstration of
and 

therefore, sin(x) = cos(90° - x).