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anygoal [31]
2 years ago
9

Which equation best represents this situation? The number 84 increased by an unknown number is equal to 115.

Mathematics
2 answers:
Lina20 [59]2 years ago
8 0
I would say option A is the correct answer....

hope this helps :)

Deffense [45]2 years ago
6 0
The phrase "increased by an unknown number"  indicates the operation of addition.  Increase by a constant is same as adding.

------> 84 + C = 115
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The pressure and volume of an expanding gas are related by the formula PV^b=C, where b and C are constants (this holds in adiaba
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The dP/dt of the adiabatic expansion is -42/11 kPa/min

<h3>How to calculate dP/dt in an adiabatic expansion?</h3>

An adiabatic process is a process in which there is no exchange of heat from the system to its surrounding neither during expansion nor during compression

Given b=1.5, P=7 kPa, V=110 cm³, and dV/dt=40 cm³/min

PVᵇ = C

Taking logs of both sides gives:

ln P + b ln V = ln C

Taking partial derivatives gives:

\frac{1}{P}\frac{∂P}{∂t}  + \frac{b}{V}\frac{∂V}{∂t} = 0

Substitutituting the values b, P, V and dV/dt into the derivative above:

1/7 x dP/dt +  1.5/110 x 40 = 0

1/7 x dP/dt +  6/11 = 0

1/7 x dP/dt = - 6/11

dP/dt = - 6/11 x 7

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Therefore, the value of  dP/dt is -42/11 kPa/min

Learn more about adiabatic expansion on:

brainly.com/question/6966596

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4 0
1 year ago
3. Look at the map. Explain why Elm Street and Birch Street are not perpendicular.
Temka [501]

Answer:

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Step-by-step explanation:

I had this same question on Gradpoint and got it correct.

4 0
2 years ago
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3 years ago
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zlopas [31]
<span>What does 4×0.2 = ?
</span>
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6 0
3 years ago
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What do I put? I am having so much trouble with this.
jek_recluse [69]
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13. \frac{4}{10} ,  \frac{4}{100}

16. \frac{3}{9} is already in simplest form.
8 0
3 years ago
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