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
GarryVolchara [31]
3 years ago
9

If x^2 +2xy -8 = 0, then when x = 4, dy/dx =

Mathematics
2 answers:
Tasya [4]3 years ago
6 0
The correct answer is E, hope I am right!
Katena32 [7]3 years ago
3 0
For simplicity, dy/dx means f'(x);
We have y = ( 8 - x^2 ) / 2x;
Then, y = 4/x - x/2;
So, f'(x) = (4/x - x/2)' = (4/x)' - (x/2)' = -4/(x^2) -1/2 because we use <span> d<span>ifferentiation formulas, such as : (f+g)' = f' + g'; (cf)' = cf'; x'=1; (1/x)' = -1/(x^2);
</span></span>Finally, f'(4) = -4/16 -1/2 = -4/16 - 8/16 = -12/16 = -3/4.
The correct answer is E.
You might be interested in
REPOST** helppp please, can someone please answer and explain this or just answer, i'd prefer an explanation too, I'm don't unde
stiv31 [10]

Answer

45 miles per hour .

5 0
2 years ago
Which multiplication expression is equivalent to x+8/x2 ÷ 2x+16/2x2
Pavlova-9 [17]

Answer:

I hope it will help you...

5 0
3 years ago
Read 2 more answers
5. 14% of 160 000 is<br>A. 14 000<br>B. 16 000<br>C. 22 400<br>D. 24 200​
Gemiola [76]
The right answer is C)

7 0
2 years ago
The length of a rectangle is 5 more than the width. The perimeter is 120. What is the length, width, and area? Please HELP
Ad libitum [116K]

Answer:

l = 32.5 units, w= 27.5 units, A = 893.75 units²

Step-by-step explanation:

width is w

length is l = 5+w

P = 2( l+w) , substitute l for 5+w

P = 2(5+w+w)

P = 2(5+2w)

P = 10 +4w

P = 120

10 +4w = 120

4w = 120-10

4w = 110

w= 110/4

w= 27.5 units

l = 5+w = 5+ 27.5 = 32.5 units

A = l*w = 27.5 * 32.5 = 893.75 units ²

5 0
2 years ago
One leg of a right triangle is 4 cm the hypotenuse is 10 cm how long it the other leg
ASHA 777 [7]
I hope this will work.
3 0
3 years ago
Read 2 more answers
Other questions:
  • The area of a circle is 37 square meters. find the radius to the nearest hundredth
    7·1 answer
  • Plz guys help me I don't no how to do math plz
    6·1 answer
  • ASAP<br>-1/8(2h+4)+1/2=-7/4<br>a.7<br>b.25/16<br>c.7/16<br>d.25
    14·1 answer
  • The table shows the width and length of different pictures that Coby has enlarged for the school yearbook: Enlarged Pictures Wid
    12·2 answers
  • The point A(-3, -2) is translated using T: (x,y) → (x + 5, y - 3). What is the distance from A to A'?
    15·1 answer
  • Your first job after college has a salary of $35,000 and will increase 6.5% each year. If you stay with the same position, what
    14·1 answer
  • 1. Which number is divisible by 2, 3, 5, and 9? A. 1,640 B. 1,999 C. 2,430 D. 3,666​
    8·1 answer
  • Ranking of best beers at the Portland Brewfest is an example of a(n)<br><br> scale.
    14·1 answer
  • In a country there are 48 000 people in the defence services. They work in the army, navy and air force in the ratio : 2.3. How
    14·1 answer
  • Will mark brainliest
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!