Write the equation of the circle in standard form. Find the center and radius. Then sketch the graph.x2 + y2 - 4x - 4y - 1 = 0
A. (x - 2)2 + (y + 2)2 = 9
(h, k) = (2, -2), r = 3
B. (x + 2)2 + (y + 2)2 = 9
(h, k) = (-2, -2), r = 3
C. (x + 2)2 + (y - 2)2 = 9
(h, k) = (-2, 2), r = 3
D. (x - 2)2 + (y - 2)2 = 9
(h, k) = (2, 2), r = 3
Answer: D
You might also like to view...
Replace the Cartesian equation with an equivalent polar equation. (x - 20)2 + (y + 3)2 = 400
A. r2 = 40r sin ? - 6r cos ? - 9 B. r2 = 40r cos ? - 6r sin ? - 9 C. r = 40 cos ? - 6 sin ? - 9 D. r2 = -20r cos ? + 3r sin ? + 400
Answer the question.Which of the following describes a study in which the patients do not know whether they are receiving the treatment or the placebo but the experimenters do know?
A. Case-control study B. Double-blind experiment C. Single-blind experiment D. Observational study
Write the number in scientific notation.8,727,000,000
A. 8727 × 106 B. 8.727 × 106 C. 8.727 × 109 D. 872.7 × 107
Write the number in simplest form, without a negative radicand.
A. 2i B. -2i C. i D. 2