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3 years ago

One way to ensure everyone in population has an equal chance to be in sample is to use____________ sampling

1 answer:

4 0

One way to ensure everyone in the population has an equal chance to be in the sample is to use random sampling.

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Find the first partial derivatives of the function f(x,y,z)=4xsin(y−z)

Amanda [17]

Answer:

$f_x(x,y,z)=4\sin (y-z)$

$f_x(x,y,z)=4x\cos (y-z)$

$f_z(x,y,z)=-4x\cos (y-z)$

Step-by-step explanation:

The given function is

$f(x,y,z)=4x\sin (y-z)$

We need to find first partial derivatives of the function.

Differentiate partially w.r.t. x and y, z are constants.

$f_x(x,y,z)=4(1)\sin (y-z)$

$f_x(x,y,z)=4\sin (y-z)$

Differentiate partially w.r.t. y and x, z are constants.

$f_y(x,y,z)=4x\cos (y-z)\dfrac{\partial}{\partial y}(y-z)$

$f_y(x,y,z)=4x\cos (y-z)$

Differentiate partially w.r.t. z and x, y are constants.

$f_z(x,y,z)=4x\cos (y-z)\dfrac{\partial}{\partial z}(y-z)$

$f_z(x,y,z)=4x\cos (y-z)(-1)$

$f_z(x,y,z)=-4x\cos (y-z)$

Therefore, the first partial derivatives of the function are $f_x(x,y,z)=4\sin (y-z), f_x(x,y,z)=4x\cos (y-z)\text{ and }f_z(x,y,z)=-4x\cos (y-z)$ .

4 0

3 years ago

Combination and permutation problems. Giving brainliest to whoever works it out and explains it to me!

Ronch [10]

Answer:

5: Permutation. 6: Combination

Step-by-step explanation:

Being that the team of Basketball players are Arranging who will change the water cooler, then the Answer is Permutation.

Mei has homework, and she's deciding which subject to do first. She has a Selection of choices, thus being the Answer- Combination.

Hope this makes sense. If you need clarification, feel free to reach back out to me.

3 0

3 years ago

1. Compare 2.01 x 1015 and 2.8 x 1013. Which number is larger?

Leya [2.2K]

Answer:

If these are in exponent form -- the answer would be 2.01 x $10^{15}$ > 2.8 x 10.3

Step-by-step explanation:

Look at the sheet attached.

6 0

3 years ago

N over 7= 20 solve for N

Blababa [14]

Answer:

N = 140

Step-by-step explanation:

N/7 = 20

Inverse operation of division: multiplication

N/7 = 20

becomes:

N = 7 x 20

N = 140

Thus, the value of N is 140.

6 0

3 years ago

Do 4x and 15 + x have the same value when x is 5? How do you know?

alexandr402 [8]

Answer:

yes

Step-by-step explanation:

If x = 5,

4x=4*5=20

15+x=15+5=20

They're both the same.

4 0

2 years ago

Read 2 more answers