The radius of a circle defined by the equation x2 – 6x + y² – 4 y – 12 = 0 is:A. 3.46В. 5.0C. 6.0O D. 7.0

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Answered: The radius of a circle defined by the…

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

ChapterP: Preliminary Concepts

SectionP.CT: Test

Problem 1CT

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A circle has equation r? + y? – 4x + 6y = 32. Find the equations of the lines which are tangent to the circle at the points where r = 8. - There are two such lines. In the blank given below, enter the equation of one line only. Write your final answer in the form y=mx+b. Don't put any spaces between characters.
1. A rocket is launched and its motion is described by the equation 2y? + 6y – 2 = 3x. Determine the coordinates of the rocket's position when v = 114.736m/s and a = 21.333m/s. v, is constant at 4m/s.
Line lį has equation 2x + y – 10 = 0. Line l2 is perpendicular to l1 and crosses the x-axis at the point A(-2,0). a Find the equation of l2. b Find the coordinates of M, the point of intersection of l1 and l2. Line l1 crosses the x-axis at B. Find the exact area of the triangle AMB.

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The radius of a circle defined by the equation x2 – 6x + y² – 4 y – 12 = 0 is: А. 3.46 В. 5.0 С. 6.0 D. 7.0