Answer:
in total there are 80 subjects. I don't know what class width is though.
Step-by-step explanation:
Look at the graph
Because this is a second degree equation you will have 2 solutions. When you take the square root of a number you have to account for both the positive and negative roots. Since the square root of 289 is 17 then your solutions are +17 and -17.
Answer: Down there there is an image with the correct answer and step by step
I hope that it helps you!
Answer:
a. 
Step-by-step explanation:
Given that

Now
if one is added i.e.

Now let us assume the other polynomial be x
So,

