chelsea73
01.10.2019 •
Mathematics
Find the center and radius of a circle defined by the equation x^2+yy^2+4x-8y+13=0
Solved
Show answers
More tips
- C Computers and Internet iPhone SMS Delivery Report: How to Set It Up...
- C Computers and Internet How to Learn to Type Fast?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home Parents or Environment: Who Has the Most Influence on a Child s Upbringing?...
- H Health and Medicine Is it true that working with a computer is harmful to your eyesight?...
- H Health and Medicine Boosting Immunity: A Complete Guide on How to Improve Your Body’s Natural Defenses...
- P Philosophy Unidentified Flying Object - What is the Nature of this Phenomenon?...
- C Computers and Internet How to Teach Older Generations to Work with Computers?...
- G Goods and services How to Choose a Coffee Maker? The Ultimate Guide for Coffee Lovers...
- C Computers and Internet Porn Banner: What It Is and How to Get Rid Of It?...
Answers on questions: Mathematics
- E English What is an implied idea in the “The Bell Rock”? The Bell Rock lighthouse is most famous because of the person who built it. The Bell Rock lighthouse was more important as...
- C Chemistry What occurs only on the surface of the substance...
- M Mathematics Adoctor estimates that a particular patient is losing bone density at a rate of 3% annually the patient currently has a bone density of 1500 kg/mg^3 doctor writes an exponential...
Ответ:
x²+y²+4x-8y +13 = 0
(x² +4x) +(y² -8y )+13 = 0
(x²+4x+4) -4 +(y-8y +16) -16 +13 = 0
(x+2)² +(y -4)² = 7
the center is : (-2 , 4) and radius √7
Ответ:
Let's check the dot product .
v.w = 5(4)-2(10) = 20 -20 =0
So the dot product is not 20 . And since the dot product is zero, so they are perpendicular.
And the y component of w is 10.
So correct options are first and third .