kidrauhll3194 kidrauhll3194
  • 03-07-2017
  • Mathematics
contestada

Find the center and radius for the circle, given the equation: x^2-14x+y^2+8=16

Respuesta :

Аноним Аноним
  • 03-07-2017
you can do this by completing the square

x^2 - 14x + y^2 + 8  = 16

(x - 7)^2 - 49 + (y + 4)^2 - 16  = 16

(x - 7)^2 + (y + 4)^2 =   16 + 16 + 49  =  81


so the center is at (7 , -4) and radius = sqrt81 = 9
Answer Link

Otras preguntas

A sighting from sea level to the top of a lighthouse was 60°. The lighthouse is known to rise 180 feet above sea level. What is the distance (to the nearest foo
George has a small coin collection.  He has collected 16 gold coins, 28 silver coins, 32 copper coins, and4 bronze coins. At a flea market, George sells 15% of
If a+b=6 and a-b = 4, what is the value of 2a + 3b?
What is the volume of a rectangular box that has base area of 75 square inches and a height of 20 inches
What would be m minus 4 in an algebraic expression
57% of 109 is what number? plz help
How did the Romans rule differently from the Etruscans?
How much work does a person do in pushing a box with a force of 10 N over a distance of 4.0 m in the direction of the force?
what percent of 126 is 22?
what were some of the problems that led to the rise of dictators in germany ,italy ,and japan?