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3 years ago

Solve for x:

Mathematics

1 answer:

barxatty [35]3 years ago

5 0

Answer: A

Step-by-step explanation:

4( 1 - x) + 2x = -3(x + 1)

4 - 4x + 2x = -3x - 3 Distribute numbers to paranthesis

4 - 2x = -3x - 3 Add like terms

4 + x = -3 Add 3x to both sides

x = -7 subtract 4 to both sides

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On a day wilderness expedition you'll need to heat of water to the boiling point each day. The air temperature will average . Yo

Dafna11 [192]

Answer:

Step-by-step explanation:5 cause i say so

8 0

3 years ago

The table in the lesson shows the number of sets of twins, triplets, quadruplets, and quintuplets registered at a twin conventio

Korolek [52]

Answer:

5494

Step-by-step explanation:

Assuming all members of each set registered, the total number is ...

2(2697) +3(29) +4(2) +5(1) = 5494

Since you're concerned with order of operations, perhaps you want to see the working out.

= 5394 + 87 +8 +5 . . . . perform all the multiplications

= 5481 +8 +5 . . . . . . . . . perform addition left to right

= 5489 +5

= 5494

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3 years ago

What is the derivative of e^(2x)

KIM [24]

Using the chain rule: The derivative of e^u is (e^u)(u'). Notice that e^u is rewritten exactly as is and then multiplied by the derivative of the exponent.
Let u=2x. So u'=2
So the derivative of e^u is e^(2x)*2 This can also be written as 2e^(2x).

5 0

3 years ago

Determine the decibel values of thermal noise power (N) and thermal noise power density (No) given the following: T=292 degrees

Agata [3.3K]

Answer: d. None of the above are correct.

Step-by-step explanation: Noise is a superfluous random alteration in an eletrical signal. There are different types of noises created by different devices and process. Thermal noise is one of them. It is unavoidable because is created by the agitation of the charge carriers, due to temperature, inside an eletrical conductor at equilibrium and is present in all eletrical circuits.

The formula to find the thermal noise power (N) is: N = $k_{b}$ .T.B, where:

$k_{b}$ is Boltzmann constant (1.38. $10^{-23}$ J/K);

T is temperature in Kelvin;

B is the bandwith;

Calculating the thermal noise power:

N = 1.38. $10^{-23}$ ·292·40

N = 16118.4. $10^{-23}$ dBm

The thermal noise power [N] = 16118.4. $10^{-23}$ dBm

Noise power density or simply Noise density (N₀) is the noise power per unit of bandwith and its SI is watts per hertz.

For thermal noise, N₀ = kT, where

<em>k </em>is the Boltzmann constant in J/K;

T is the receiver system noise temperature in K;

N₀ = 1.38. $10^{-23}$ . 292

N₀ = 402.96. $10^{-23}$ W/Hz

The thermal noise power density [N₀] = 402.96. $10^{-23}$ W/Hz

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3 years ago

The heights of all the newborns in a certain country are normally distributed,

viva [34]

Answer:

Step-by-step explanation:

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3 years ago