Find the center and the radius of the circle.x2 + y2 - 14x + 8y + 1 = 0
A. center (7, -4), radius = 8
B. center (4, -7), radius = 64
C. center (-7, 4), radius = 64
D. center (-4, 7), radius = 8
Answer: A
Mathematics
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Find the exact value. Do not use a calculator.tan 
A. -1
B. 0
C. 
D. 1
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Perform the indicated operations and simplify the result. Leave the answer in factored form.
? 
A. 
B. 
C. 
D. 1
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Divide and express the result in standard form.
A. 
+ 
i
B. 
+ 
i
C. 
+ 
i
D. 
- 
i
Mathematics
Identify the operation to perform on each side of the equation to isolate the variable.17 = k - 7
A. Add 17 B. Subtract 7 C. Subtract 17 D. Add 7
Mathematics