Why was Elmo's Report Card All Wet?

Math it's appreciated. (picture provided)

Find cot x if sin x cot x csc x = √2

What are the interpretations of the line 3x - 15y = 60? x-intercept y-interception a: x 20 - y -4 b: x 5 - y 20 c: x -3 - y 15 d: x -4 - y 20