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Misha Larkins [42]
3 years ago
10

Help me with #4 pleasedeeee

Mathematics
1 answer:
Romashka [77]3 years ago
4 0

Answer:

\dfrac{dy}{dx}=-\dfrac{2x-y-1}{2y-x-1}

Step-by-step explanation:

Differentiating, you get ...

... x·dy +y·dx +dx +dy = 2x·dx +2y·dy

Collecting terms gives ...

... dy(x +1 -2y) = dx(2x -y -1)

... dy/dx = -(2x -y -1)/(2y -x -1)

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A number is three less than six times another numbers. The sum is 53. Find the numbers
Pachacha [2.7K]
X = 6y - 3
x + y = 53

6y - 3 + y = 53
7y - 3 = 53
7y = 53 + 3
7y = 56
y = 56/7
y = 8

x = 6y - 3
x = 6(8) - 3
x = 48 - 3
x = 45

ur numbers are : 8 and 45
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The cost C (in dollars) of making n watches is represented by C = 15n + 85 .
AURORKA [14]
So the answer should be 48.58 if not then it could be 278n
5 0
3 years ago
James is playing his favorite game at the arcade. After playing the game 3 times, he has 8 tokens remaining. He initially had 20
lapo4ka [179]
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3 years ago
What is the answer to this question
Lesechka [4]

Remark

There's a lot you don't know here. Are DE and GF parallel? Is B a right angle? You can't assume that it is. The safest way to proceed is to give x in terms of 58 and B. You might get an answer that gives you something like 32 but I don't think you can say that unless you are told somewhere that ABC is a right angle triangle with the right angle at B.

So what to do.

<BAC = 58o                               That's because <BAC = <IAK They vertically opposite.

<ABC + <BAC + <ACB = 180o       All triangles have 180o

<ACB = 180 - 58 - <ABC                Solve for an unknown angle of a triangle.

<ACB = 122 - <ABC

x = <ACB                                       Vertically opposite angles.

x = 122 - <ABC                             Answer  It's 32 if ABC is a right angle.  

6 0
3 years ago
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