3 years ago

Which statement is an example of heat transfer by convection?

Mathematics

1 answer:

Paraphin [41]3 years ago

8 0

Answer: Hot air from the sand rose and was replaced by cool air blowing in from the ocean as a sea breeze.

Step-by-step explanation:

sorry it's late but hopefully it will help others

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For which values of the parameter B the following system admits a unique solution [ 1 b 1-b 2 2 0 2–2B 4 0] [x y z] = [1 2 0]

photoshop1234 [79]

Answer: β ≠ ±1

Step-by-step explanation: For a system of equations to have an unique solution, its determinant must be different from 0: det |A| ≠ 0. So,

det $\left[\begin{array}{ccc}1&\beta&1-\beta\\2&2&0\\2-2\beta&4&0\end{array}\right]$ ≠ 0

Determinant of a 3x3 matrix is calculated by:

det $\left[\begin{array}{ccc}1&\beta&1-\beta\\2&2&0\\2-2\beta&4&0\end{array}\right]\left[\begin{array}{ccc}1&\beta\\2&2\\2-2\beta&4\end{array}\right]$

$8(1-\beta)-[2(2-2\beta)(1-\beta)]$

$8-8\beta-4+8\beta-4\beta^{2}$

$-4\beta^{2}+4\neq 0$

$\beta^{2}\neq 1$

$\beta \neq \sqrt{1}$

β ≠ ±1

For the system to have only one solution, β ≠ 1 or β ≠ -1.

7 0

4 years ago

The mean score of a placement exam for entrance into a math class is 80, with a standard deviation of 10. Use the empirical rul

Sedbober [7]

Answer:

47.5%

Step-by-step explanation:

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3 years ago

(-1) + (-7) answer with work shown

lesya [120]

Answer is -8

(-1)+(-7) turns into (1)+(7)=8 and then back to original which will be -8

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3 years ago

How to solve this problem?

makkiz [27]

The answer is c because, if u change 15% to a decimal (0.15) then u get 5,250 and when u add that to 35,000 you get 40,250

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3 years ago

What is the conjugate<br> 2/4+3i

kondor19780726 [428]

*) 2/4+3i
2+3i
I'm not sure is that right or wrong

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3 years ago