4 years ago

True or false ? In the body of an indirect, proof you must show that the assumption leads to a contradiction

Mathematics

1 answer:

Mice21 [21]4 years ago

7 0

I may be wrong, but I do believe the answer is true

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En las competencias de atletismo hay 120 participantes; 30 en la prueba de 100 m, 50 en la de 200 m y 40 en la carrera de relevo

IceJOKER [234]

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120 by the questiom we have tl do plus or not

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3 years ago

6. A tank contains 100-gallon of pure water. At time t = 0, a solution containing 2 lb of salt per gallon flows into the tank at

SOVA2 [1]

Answer:

The answer is below

Step-by-step explanation:

Let Q represent the amount of salt in the tank at time t.

$\frac{dQ}{dt}= flow\ in - flow\ out\\ \\flow\ in=3\ gal/min*2\ lb/gal=6\ lb/min\\\\net\ gain\ in\ tank\ volume=3-4=-1, henceflow\ out= \frac{4Q}{100-t} \\\\\frac{dQ}{dt}= 6-\frac{4Q}{100-t} \\\\\frac{dQ}{dt}+ \frac{4Q}{100-t}=6\\\\The \ integrating\ factor\ is:\\\\IF=e^{\int\limits {\frac{4}{100-t} } \, dt }=e^{-4\int\limits {\frac{-1}{100-t}}=e^{-4ln(100-t)}=(100-t)^{-4}}\\\\Multiplying\ through \ by\ IF: \\\\(100-t)^{-4}\frac{dQ}{dt}+ (100-t)^{-4}\frac{4Q}{100-t}=6(100-t)^{-4}\\\\$

$Integrating:\\\\A(100-t)^{-4}=-2(100-t)^{-3}+c\\\\A=-2(100-t)+\frac{c}{(100-t)^{-4}} \\\\at, t=0,A=0\\\\0=-2(100-0)+\frac{c}{(100-0)^{-4}}\\\\c=0.02\\\\A=-2(100-t)+\frac{0.02}{(100-t)^{-4}}$

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3 years ago

Describe one kind of diagram you might draw to help you solve a problem

Mila [183]

You can use a bar graph or histogram to compare amounts of items You can also draw arrays to help with multiplication problems.
In algebra, you can graph equations to see points of sets.

Hope this helps!

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3 years ago

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What should Jayce conclude is the distance around the largest circle on the radar screen? Use pi = 3.14.

anastassius [24]

Answer:

it would end up right in the dot hope this helped :)

Step-by-step explanation:

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3 years ago

In five years, Josh will be 21 years old. How old is he now? Let J represent Josh's current age. Which formula would correctly c

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