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3 years ago

Dexter has worked out 3/5 x 8 here is his working. explain the mistake he has made.

Mathematics

1 answer:

Tcecarenko [31]3 years ago

8 0

Answer:

He multiplyed 3x8 and 5x8 when it should be 3x8 and 5x1 because you but 1 under the 8 to make it into a fraction.

Step-by-step explanation:

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2 points) Suppose w=xy+yzw=xy+yz, where x=et, y=2+sin(t)x=et, y=2+sin⁡(t), and z=2+cos(3t)z=2+cos⁡(3t). A ) Use the chain rule t

Olenka [21]

Answer:

$\frac{\partial w}{\partial t} = y(e^t) +(x+z)*(cos(t)) - 3y*sin(3t)$

Step-by-step explanation:

First, note that

$\frac{\partial x}{\partial t} = e^{t} \\\frac{\partial y}{\partial t} = cos(t)\\$

And using the chain rule in one variable

$\frac{\partial z}{\partial t} = -3sin(3t)$

Now remember that the chain rule in several variables sates that

$\frac{\partial w}{\partial t} = \frac{\partial w}{\partial x} * \frac{\partial x}{\partial t} + \frac{\partial w}{\partial y} * \frac{\partial y}{\partial t} + \frac{\partial w}{\partial z} * \frac{\partial z}{\partial t}$

Therefore the chain rule in several variables would look like this.

$\frac{\partial w}{\partial t} = y(e^t) +(x+z)*(cos(t)) - 3y*sin(3t)$

6 0

4 years ago

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Mrrafil [7]

I just took the test the correct answer is:
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3 years ago

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What is the range of the function?

Eduardwww [97]

Answer:

Step-by-step explanation:

The range of a function is the complete set of all possible resulting values of the function

which is here just (3 , 9 , 12)

so the choice is C.

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2 years ago

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Strike441 [17]

Answer:

Step-by-step explanation:

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3 years ago

5×10 to the power of −2 times 6.5x10 to the power of -4

Dominik [7]

Answer:

3.25 x 10^-5

Step-by-step explanation:

( 5 x 10^-2 ) x ( 6.5 x 10^-4 )

1/20 x 13/20000

13/400000

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7 0

3 years ago