Answer:
b < 64
First box: 8
Second box: 8
Third box: <
Fourth box: 64
*Look carefully so you don't enter the wrong numbers*
Step-by-step explanation:



*View attach graph*
Hope this helps!
Unsure of what you mean by "reference number."
I do recognize that 11pi/9 is in quadrant III. I suspect that the so-called "reference number" is the acute angle between the end ray of 11pi/9 and pi, or, in more easily comparable numbers, between 9pi/9 and 11pi/9.
That difference is 2pi/9.
I think answer is y=7/8x-5/2

Multiply equation (i) with a and equation (ii) with b ,

Adding (iii) and (iv) , we get ,

Now , from (i) ,

One.
To solve this, first combine like terms.
6x + 4x - 6 = 24 + 9x
10x - 6 = 24 + 9x
Then move all like terms to one side.
10x - 9x = 24 + 6
x = 30