Rewrite the equation in standard form. Find the center and radius of the circle.x2 + y2 + 16x + 63 = 0
A. (x - 8)2 + y2 = 1
center (8, 0), r = 1
B. (x + 8)2 + y2 = 1
center (8, 0), r = 1
C. (x + 8)2 + y2 = 1
center (-8, 0), r = 1
D. x2 + (y + 8)2 = 1
center (0, -8), r = 1
Answer: C
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Tell whether the relation is reflexive, symmetric, or transitive on the set of all people. Also tell whether the relation is an equivalence relation."Lives next door to"
A. Symmetric; not an equivalence relation B. Transitive; not an equivalence relation C. Symmetric and transitive; equivalence relation D. Reflexive and symmetric; not an equivalence relation
Answer the question.What values of n will make xn a perfect square?
A. n must be odd. B. n must be even. C. n must be a multiple of 5. D. n must be a power of 3.
Find the real numbers x and y that make the equation true.
= 
+ 
A. x = 0, y = 6 B. x = 0, y = - 1 C. x = 8, y = 1 D. x = 8, y = 6
Add or subtract as indicated and write the result in standard form.8i + (-7 - i)
A. 7 - 7i B. 7 - 9i C. -7 + 9i D. -7 + 7i