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2 years ago

What is the answer?? Please help me!!! ❤️

Mathematics

1 answer:

oee [108]2 years ago

6 0

Answer:

4a²+3ab-a+a²

Step-by-step explanation:

So let's start off by simplifying this expression:

3a²-2ab+3b²-a+a²+5ab-3b²

Now let's subtract common terms XD

4a²+3ab-a+a²

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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:

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

6 0

2 years ago

4/7 = ?/42 fill in the the blank to make the two fractions equivalent

sukhopar [10]

Answer:

24/42

Step-by-step explanation:

42÷7=6

4x6/7x6=24/42

6 0

2 years ago

A media poll of 500 air travelers surveyed in national airports found that 370 favor tighter security procedures in boarding pla

serg [7]

Answer:

92% Confidence interval: (0.7078,0.7722)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 500

Number of travelers who favor tight security, x = 370

$\hat{p} = \dfrac{x}{n} = \dfrac{370}{500} = 0.74$

92% Confidence interval:

$\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.08} = \pm 1.645$

Putting the values, we get:

$0.74\pm 1.645(\sqrt{\dfrac{0.74(1-0.74)}{500}}) = 0.74\pm 0.0322\\\\=(0.7078,0.7722)$

3 0

2 years ago

If twice a number, added to 3 is divided by the number plus 5, the result is three halves. Find the number.

Lynna [10]

Answer:2

Step-by-step explanation:

(2x+5)/3 = 3/2

Multiply both sides by 3:

2x + 5 = 9/2

Subtract 5 from both sides:

2x = 9/2 - 5 = 9/2 - 10/2 = 3/2

Divide both sides by :

x = 3/4

7 0

1 year ago

Read 2 more answers

If we digitized music in stereo using 24 bits per sample and sampling the analog signal 96,000 times per second, this would gene

ryzh [129]

The bit stream generated on kilobyte per second would be 2304 kilobytes per second.

Given the Parameters :

Number of bits per sample = 24 bits

Sampling frequency = 96000 times per second

The bit rate = Sampling frequency × Number of bits per sample

The bit rate = 24 × 96000 = 2,304,000 bits per second

Converting bits to kilobytes ;

1 kilobytes = 1000 bits

(2,304,000 bits per second ÷ 1000) = 2304 kilobytes per second

Therefore, the bit stream generated would be 2304 kbps

Learn more :brainly.com/question/18109354

6 0

1 year ago