I’m not 100% sure but isn’t it x2 +xy +y2?
The answer is 4/15, because we have to get the denominaters to be the same, so the LCM of 5 and 15 is 15, so 15/5 is 3 and 4*3 is 12. Now, its 12/15-8/15 which is 4/15. Hope this helps!
Answer:

Step-by-step explanation:
Given
The x and y values
Required
The regression line equation
Because of the length of the given data, I will run the analysis using online tools, then analyze the result.
From the analysis, we have:


--- Sum of squares
--- Sum of products
The regression equation is calculated as:

Where:

So, we have:




So:
becomes

Well 2 months and 16 days
Answer: D, or 1+cotangent squared theta= cosecant squared theta
Step-by-step explanation: Took the test it is right