Find the center (h, k) and radius r of the circle. Graph the circle.(x - 2)2 + (y - 4)2 = 
A. (h, k) = (- 2, - 4); r = 
B. (h, k) = (- 2, - 4); r = 
C. (h, k) = (2, 4); r = 
D. (h, k) = (2, 4); r = 
Answer: C
Mathematics
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Solve the equation. Express radicals in simplest form.
w2 - 
w = -1
A. 
B. 
C. 
D. ?
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Indicate whether the function is one-to-one.A = {(-9, -11), (20, 15), (-4, -7)}
A. No B. Yes
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A right triangle with acute angle ? is given. Evaluate the indicated trigonometric function of the acute angle ?.Find sin ?.
A. 
B. 
C. 
D. 
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Determine the constant that should be added to the binomial so that it becomes a perfect square trinomial. Then write and factor the trinomial.x2 + 
x
A. 
; x2 + 
x + 
= 
2
B. 144; x2 + 
x + 144 = (x +12) 2
C. 
; x2 + 
x + 
= 
2
D. 
; x2 + 
x + 
= 
2
Mathematics