Its because 20 is doubling its self. Its using 100% of its number, While 40 is decreasing by 50%. Half of forty is 20. Half equals 50%.
Answer:

Step-by-step explanation:
The hypotenuse is 




The terminal side of
is in the second quadrant.
In this quadrant; the secant ratio is negative.



Answer:
x = 3 and y = 3
Step-by-step explanation:
4 times 3 is 12. 2 times 3 is 6
12 minus 6 is 6