D. 24x + 16y is your answer
Tan x=opposite/adjacent
cot x=adjacent/opposite
so you need to inverse the fraction
tan x=.78 as a fraction is 78/100
-> inversed= 100/78=1.28=cot x
so it is the second option
Clara= 30+45 (75)
Adam = 2x75 (150)
745+5+150=270min
Choice B:
The line intersects at both points (0,-3) and (1,0)
(I can not specifically see the number on the grid if there is any but that is what I would put for the answer based on what I see)
If you want me to explain it more I can try to! :)
I hope this helps