Answer:21
Step-by-step explanation: plug in 19 and 1
1x3 is 3 plus 19 is 21
Answer:
this question is not complete. need another equation
Step-by-step explanation:
give another equation then I can solve

Answer: none of them is right, did you meant maximum 4 and minimum 2?
Step-by-step explanation: cos x gets values between 1 and -1.
If you add 3 you get values between 4 and 2.
Answer:
Step-by-step explanation:
Ok but where is the question
Don't know if it's right, but do let me know! use percentage to visualise your workings. :)