PLEASE HELP ME WITH THIS I NEED IT THANKS

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Find cot x if sin x cot x csc x = √2

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes. she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?