Answer:

Step-by-step explanation:
1. Distribute the X across the equation: 
2.
3.
3.
Answer:
(x-7)^2+(y-8)^2=121
Step-by-step explanation:
T = 60
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Answer:
135 degrees
Step-by-step explanation:
2π radians is the central angle of a full circle, so 2π radians is 360 degrees.
That means that π radians = 180 degrees.
3π/4 radians * (180 degrees)/(π radians) = 135 degrees