Nooooooooooooooooooooooooo
Since complementary angles add up to 90 degrees, we simple take

and simplify it to

°
We have x = 4 repeating itself
If we graph the two points (4,1) and (4,20), then we see the relation fails the vertical line test.
The input x = 4 leads to more than one output y = 1 and y = 20 simultaneously.
This is why we don't have a function.
I think b may not be right
Answer:
Step-by-step explanation:
Thrice the sum of three fifths and two thirds less one half is expressed as 3(3/5 + 2/3)-1/2
Open the parenthesis
3(3/5) + 3(2/3) - 1/2
= 9/5 + 6/3 - 1/2
Find LCM
= 9(6)+10(6)-15/30
= 54+60-15/30
= 54+45/30
= 99/30
= 3 9/30
= 3 3/10
Hence the number id 3 3/10