destinylit destinylit
  • 02-04-2017
  • Mathematics
contestada

What is the radius of a circle with the equation x2 + y2 – 14x + 10y = 250?

Respuesta :

kaveejethwa
kaveejethwa kaveejethwa
  • 02-04-2017
complete the square .

x^2-14x = (x-7)^2-(-7)^2 
             = (x-7)^2-49
y^2+10y = (x+5)^2-(5)^2
              =(x+5)^2-25
(x-7)^2+(y+5)^2-49-25=250
(x-7)^2+(y+5)^2=324
                         =sqrt 324
                         =18
Answer Link

Otras preguntas

what is the greatest common factor of 49 and 63
I have 5 min. so please answer fast .An XBOX 360 regularly sells for $399. It is on sale for 20% off. What is the sale price of the XBOX 360? A)$78.80 B)$300.0
what property describes the number sentence 6 Plus 0 equals 6
The English Bill of Rights declared that each member of Parliament had the right to
What might cause someone's mental map of place things to change
You are asked to find the mean of the data shown in the stem-and-leaf plot. Which tools are appropriate? Choose exactly two answers that are correct. a. protra
Building a mass transit system is likely to have which of the following effects? increasing air pollution traffic congestion increasing the temperature of the u
Taiwan’s agricultural economy grew when the Nationalists instituted _____. a command economy a system of collective farms trade agreements with Pacific Rim coun
write the number in two other forms 7.632
Which words make up the prepositional phrase in this sentence? Our family often picks fresh, ripe strawberries around Memorial Day. a. fresh, ripe strawberries