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3 years ago

Using Cramer's Rule, what is the value of x in the solution to the system of linear equations below?

Mathematics

1 answer:

arlik [135]3 years ago

4 0

Answer:

the answer is D. there are infinite solutions to the system

Step-by-step explanation:

just took the test

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What is the product -3 1/3of -8 7/10 and ?

Oksana_A [137]

Answer:

Brainliest!!!

Step-by-step explanation:

See picture!!

5 0

3 years ago

Solve the equation for the value of x, -4x=36 Please show your work, thank you.

Marianna [84]

Answer:

x = -9

Step-by-step explanation:

First,Add 4 to both sides

-4x-4+4=36-4+4

Then,simplify

-4x=36

divide both sides by -4

-4x/-4 = 36/-4

Lastly simplify it to get your answer!

3 0

3 years ago

A fluid moves through a tube of length 1 meter and radius r=0.006±0.00025 meters under a pressure p=4⋅105±2000 pascals, at a rat

iris [78.8K]

Answer:

Maximum error for viscosity is 17.14%

Step-by-step explanation:

We know that everything is changing with respect to the time, "r" is changing with respect to the time, and also "p" just "v" will not change with the time according to the information given, so we can find the implicit derivative with respect to the time, and since

$n = (\frac{\pi}{8}) (\frac{pr^4}{v})\\$

The implicit derivative with respect to the time would be

$\frac{dn}{dt} = \frac{\pi}{8} ( \frac{r^4}{v} \frac{dp}{dt} + \frac{4pr^3}{v}\frac{dr}{dt} )$

If we multiply everything by dt we get

$dn = \frac{\pi}{8} ( \frac{r^4}{v} dp + \frac{4pr^3}{v} dr})$

Remember that the error is given by $\frac{dn}{n}$ therefore doing some algebra we get that

$\frac{dn}{n} = 4 \frac{dr}{r} + \frac{dp}{p}$

Since, r = 0.006 , dr = 0.00025 , p = 4*105 , dp = 2000 we get that

$\frac{dn}{n} = 0.1714$

Which means that the maximum error for viscosity is 17.14%.

5 0

3 years ago

Suma doua numere este 702.Diferenta lor este un sfert din scazator .Afla cele doua numere dAU COROANA

Molodets [167]

Answer:

Cele două numere căutate sunt:

390
312

Step-by-step explanation:

Pentru a rezolva necunoscutul cu aceste două numere, trebuie create două ecuații cu două necunoscute X și Y cu informațiile obținute: În primul rând, știm că suma celor două numere este egală cu 702, prin urmare:

1. X + Y = 702

Apoi se menționează că diferența (adică scăderea) dintre cele două numere este egală cu un sfert din numărul cel mai mic, pentru a avea o referință, vom identifica variabila Y ca fiind cel mai mic număr, deci a doua ecuație ar fi:

2. X - Y = 0,25Y sau Y / 4

Ștergem variabila X în a doua ecuație:

X - Y = 0,25Y
X = 0,25Y + Y
X = 1,25Y

Ecuația 1 este acum folosită cu X-ul șters:

X + Y = 702
1,25Y + Y = 702
2,25Y = 702
Y = 702 / 2,25
Y = 312

Acum, din moment ce se știe că este X = 1.25Y, valoarea lui Y este înlocuită și obținem:

X = 1,25Y
X = 1,25 * 312
X = 390

8 0

3 years ago

What is the midpoint of the line segment with endpoints (–5.5, –6.1) and (–0.5, 9.1)?

astraxan [27]

$\bf ~~~~~~~~~~~~\textit{middle point of 2 points }
\\\\
(\stackrel{x_1}{-5.5}~,~\stackrel{y_1}{-6.1})\qquad 
(\stackrel{x_2}{-0.5}~,~\stackrel{y_2}{9.1})
\qquad
% coordinates of midpoint 
\left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right)
\\\\\\
\left( \cfrac{-0.5-5.5}{2}~~,~~\cfrac{9.1-6.1}{2} \right)\implies \left( \cfrac{-6}{2}~~,~~\cfrac{3}{2} \right)\implies \left(-3~,~1\frac{1}{2} \right)$

5 0

3 years ago