
Therefore, 20/21 is the answer.
Answer:
The answer is "(4, -5)".
Step-by-step explanation:
Please find the complete question in the attached file.
In the given image file when we rotate it to 90 degrees clockwise so the value as the rule is 
Putting the value in x = 5 and y = 4 then:

Answer:
-7y^2-x+11y
Step-by-step explanation:
False. Obtuse is always greater than 90°.