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german
3 years ago
11

Daniel, Jim and David share £80 in the ratio 3:6:7 respectively. David gets the biggest share,

Mathematics
1 answer:
shutvik [7]3 years ago
6 0

Answer:

Got my points deducted by a loser name PoeticAesthetics

Step-by-step explanation:

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Evaluate the surface integral. s x ds, s is the triangular region with vertices (1, 0, 0), (0, −2, 0), and (0, 0, 12).
aniked [119]
Parameterize the surface by

\mathbf r(s,t)=(1-s)(0,0,12)+s\bigg((1-t)(1,0,0)+t(0,-2,0)\bigg)
\implies\mathbf r(s,t)=(x(s,t),y(s,t),z(s,t))=(s-st,-2st,12-12s)

where (s,t)\in(0,1)\times(0,1). We have

\|\mathbf r_s\times\mathbf r_t\|=\|(1-t,-2t,-12)\times(-s,-2s,0)\|=2\sqrt{181}s

The surface integral is then

\displaystyle\iint_Sx\,\mathrm dS=2\sqrt{181}\int_{s=0}^{s=1}\int_{t=0}^{t=1}s(s-st)\,\mathrm dt\,\mathrm ds
=\displaystyle2\sqrt{181}\left(\int_{s=0}^{s=1}s^2\,\mathrm ds\right)\left(\int_{t=0}^{t=1}(1-t)\,\mathrm dt\right)
=\dfrac{\sqrt{181}}3
7 0
3 years ago
The Russo-Japanese War was a conflict between Russia and Japan that started in the year 190419041904. Let xxx represent any year
wel
The first thing we must do for this case is to define a variable.
 We have then:
 x: number of years before the Russo-Japanese conflict began
 We write now the inequality that models the problem.
 We know that the conflict began in the year 1904, therefore, all the previous years are given by:
 x <1904
 Answer:
 
an inequality in terms of x and 1904 that is true only for values of x that represent years before the start of the Russo-Japanese War is:
 
x <1904
4 0
3 years ago
Read 2 more answers
Please help me with these questions
kaheart [24]

Answers:

1st pic:

a) 2

b) 2.5 or 2

2nd pic:

a) 4

b) 5

c) 9

3rd pic:

a) 5

b) 3

Note: I may not be correct on all of them. Some of them were confusing a little bit, so I just wanted to let you know. Please don't come after me in the comments if I am wrong with one of the answers. In reality, you should be doing this. Either way, I hope this helps! Please, please, PLEASE mark brainliest. I would really appreciate it. :)

8 0
3 years ago
The points at which the curve changes from curving upward to curving downward are called what
marshall27 [118]

Answer:

Inflection points. It's where the second derivative of the function is equal to zero

Step-by-step explanation:

7 0
3 years ago
What is 233 x 234 ???
andre [41]

Answer:

the answer is 54522

Step-by-step explanation:

hope it helps

7 0
3 years ago
Read 2 more answers
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