1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nataliya [291]
3 years ago
7

If -xy – 5+ y^2+ x^2= 0 and it is known that dy/dx= y-2x/-x+2y, find all

Mathematics
1 answer:
sleet_krkn [62]3 years ago
3 0

Answer:

There is no point of the form (-1, y) on the curve where the tangent is horizontal

Step-by-step explanation:

Notice that when x = - 1. then dy/dx becomes:

dy/dx= (y+2) / (2y+1)

therefore, to request that the tangent is horizontal we ask for the y values that make dy/dx equal to ZERO:

0 = ( y + 2) / (2 y + 1)

And we obtain y = -2 as the answer.

But if we try the point (-1, -2) in the original equation, we find that it DOESN'T belong to the curve because it doesn't satisfy the equation as shown below:

(-1)^2 + (-2)^2 - (-1)*(-2) - 5 = 1 + 4 + 2 - 5 = 2  (instead of zero)

Then, we conclude that there is no horizontal tangent to the curve for x = -1.

You might be interested in
PLEASE HELP!! WILL MARK BRAINLIST ​
gayaneshka [121]

Answer:

3/50 7/50 40/50

Step-by-step explanation:

Ok. I'm not exactly a math wiz but I think you may be overthinking this. Experimental probability should be the probability from the experiment right. It's in the name. In chemistry if it's a well established value it's called a theoretical value or probability. So the answer should just be the probability from the said experiment. No other funky math terms are given here which clues me to the idea that it might just be this simple.

5 0
2 years ago
Read 2 more answers
An electrician charges $40 to come to your house she also charges $55 for each hour that she works the electrician charges you a
s2008m [1.1K]
First lets remove the initial fee
190 - 40 = 150
150 is how much she is charging you per hour.
If each hour is 55, lets divide 150 by 55.
150 \div 55 = 2.7
She charged you for 2.7 hours (almost 3) of service
3 0
3 years ago
Horse races are often measured in furlongs. Oakland Park is 6 furlongs. How long is that in miles? (1 furlong = 1/8 mile)
Pachacha [2.7K]
1 furlong = 1/8 miles
6 furlongs = x miles
xmiles = 1/8(6 furlongs)
Xmiles= 3/4 miles
Which is 0.75 miles



Please give my answer the brainliest
7 0
3 years ago
What is the common factors of 15,45 and 90
mina [271]
1,2,3,5,6,9,10,1518,30,45,90
8 0
3 years ago
Luke live 0.4 kilometer from a skating rink. Marie lives 0.25 kilometer from the skating rink. Who lives closer to the skating r
inessss [21]
Marie because if you put a 0 behind .4 that equals .40 and then you compare .25 and .40 therefore .25 is closer 
3 0
3 years ago
Other questions:
  • Troista Mobile Accessories sells mobile apps on their Web site. If a customer spends on average, $12 per visit and visits the We
    11·1 answer
  • Drive-in movies were popular in the 1930s and 1940s. In 1933, there were 100 drive-in theater in the U.S by 1945 there were 2200
    10·1 answer
  • Please HELP! Which figure is a regular convex polygon?
    12·1 answer
  • Help im starving... jk help ,me with maTH
    6·1 answer
  • Tina is making a cylindrical sandbox that has a radius of 2 feet. She bought 18.84 cubic feet of sand for the sandbox. Which hei
    6·1 answer
  • 1/3 *divide* 3/8 = m<br><br> help?
    7·2 answers
  • Solve for x for both of these plssss i need help
    9·1 answer
  • Enter a digit in each box to complete the division problem.
    6·1 answer
  • PLS HELP ASAP WILL MARK BRAINLIST !!! (If its right, might have to wait a day or to cause i have to see if its right)
    15·2 answers
  • If he = 7x -27 find the value of x
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!