Decide whether or not the equation has a circle as its graph. If it does not, describe the graph. x2 + y2 + 14x- 4y+28 = 0 yes no; the graph is the point (-7,2) no; the graph is the point (7, -2) no; the graph is nonexistent Suppose that receiving stations X, Y, and Z are located on a coordinate plane at the points (1,2), (-11,10), and (-7, -14) respectively. The epicenter of an earthquake is determined to be 5 units from X, 15 units from Y, and 13 units from Z. Where on the coordinate plane is the epicenter located? at (-3,0) at (-1,-3) at(-2,-2) at (-1,-2) Find the center-radius form of the equation of a circle with center (2,9) and tangent to the x-axis. (x + 2)2 + (y + 9)2 = 81 (x - 2)2 + (y - 9)2 = 81 (x + 2)2 + (y + 9)2 = 4 (x - 2)2 + (y - 9)2 = 4
Show transcribed image text Decide whether or not the equation has a circle as its graph. If it does not, describe the graph. x2 + y2 + 14x- 4y+28 = 0 yes no; the graph is the point (-7,2) no; the graph is the point (7, -2) no; the graph is nonexistent Suppose that receiving stations X, Y, and Z are located on a coordinate plane at the points (1,2), (-11,10), and (-7, -14) respectively. The epicenter of an earthquake is determined to be 5 units from X, 15 units from Y, and 13 units from Z. Where on the coordinate plane is the epicenter located? at (-3,0) at (-1,-3) at(-2,-2) at (-1,-2) Find the center-radius form of the equation of a circle with center (2,9) and tangent to the x-axis. (x + 2)2 + (y + 9)2 = 81 (x - 2)2 + (y - 9)2 = 81 (x + 2)2 + (y + 9)2 = 4 (x - 2)2 + (y - 9)2 = 4