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2 years ago

Helppppp please !!!

Mathematics

2 answers:

larisa86 [58]2 years ago

7 0

No values of x make the equation true

kykrilka [37]2 years ago

6 0

The answer in top left

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9(w - 2) = – 18<br> someone help me

drek231 [11]

Step-by-step explanation:

First multiply

9w - 18 = - 18

9w = - 18 + 18

9w = 0

w = 0 / 9 = 0

w = 0

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3 years ago

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Express as a unit rate. $18.50 for 5 lbs

m_a_m_a [10]

Answer:

3.7 dollars per lb

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2 years ago

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1/8 multiplied by 4 2/3

Anna35 [415]

First you Change the mixed number to an improper fraction (14/3) then you simplify (1/4 X 7/3) and then you multiply 1/4 X 7/3 = 7/12 :)

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2 years ago

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The gas law for an ideal gas at absolute temperature T (in kelvins), pressure P (in atmospheres), and volume V (in liters) is PV

JulijaS [17]

Answer:

$\frac{dT}{dt}=3.78^{\circ}K/min$

Step-by-step explanation:

We have to calculate the time derivative of T=PV/nR with P and V variable and n and R constants. This is:

$\frac{dT}{dt} =\frac{d\frac{PV}{nR}}{dt}=\frac{1}{nR}\frac{d(PV)}{dt}$

What we have to do is the derivative of a product:

$\frac{d(PV)}{dt}=P\frac{dV}{dt}+V\frac{dP}{dt}$

Substituting, we have:

$\frac{dT}{dt} =\frac{P\frac{dV}{dt}+V\frac{dP}{dt}}{nR}$

where all these values are given since the time derivatives of P and V are their variation rate, using minutes.

We then substitute everything, noticing that already everything is in the same system of units so they cancel out:

$\frac{dT}{dt}=\frac{P\frac{dV}{dt}+V\frac{dP}{dt}}{nR}=\frac{(8atm)(0.16L/min)+(13L)(0.14atm/min)}{(10mol)(0.0821Latm/mol^{\circ}K)}$

And then just calculate:

$\frac{dT}{dt}=3.78^{\circ}K/min$

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2 years ago

Tickets for 2 adults and 4 children at a theme park cost £152.

beks73 [17]

hope it helps!!!!

please mark brainliest

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2 years ago

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