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Valentin [98]
3 years ago
7

Follow the steps to solve this equation:

Mathematics
2 answers:
saw5 [17]3 years ago
5 0
4X-8=12
+8 +8

4x/4=20/4

X=5

seropon [69]3 years ago
4 0

Answer:

x= 5 (i did it and got it right i read through what i had to do and got 5 as my anwser so i hope this helps you

Step-by-step explanation:

:)

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I will give brianliest pls answer correctly
grigory [225]

Answer:

Use Math-way or photo-math

Step-by-step explanation:

Use Math-way or photo-math

5 0
3 years ago
Read 2 more answers
Newton's Law of Cooling states that the rate of change of the temperature of an object, T, is proportional to the difference of
maria [59]

Answer:

  305 °F

Step-by-step explanation:

The core temperature of the object after 4 hours can be found using an exponential decay formula to model the decay of the difference between core temperature and ambient.

<h3>Cooling Model</h3>

The solution to the differential equation described by Newton's law of cooling is the exponential equation ...

  y = ab^t +c

where 'a' is the initial core temperature difference from ambient, 'b' is the decay factor of that difference in 1 unit of time period t. 'c' is the ambient temperature.

For this problem, the ambient temperature is c=80, and the differences of interest are ...

  a = 1200 -80 = 1120

  b = (830 -80)/1120 = 75/112

Using these values in the model gives ...

  y = 1120(75/112)^t +80 . . . . . . where y(t) is the core temperature at time t

Note that units of time are hours.

<h3>Application</h3>

We want y when t=4.

  y = 1120(75/112)^4 +80 ≈ 1120(0.20108) +80 ≈ 305.212

The core temperature after 4 hours is about 305 °F.

__

<em>Additional comment</em>

The differential equation will have a solution of the form ...

  T-T_R=(T_0-T_R)e^{kt}

where k = ln(75/112) ≈ -0.40101

In the above, we defined b = e^k = 75/112. Accuracy with this fraction can be better than using a truncated value of k.

5 0
2 years ago
Round your answer to the nearest tenth.<br> y = 2x + 7 y=2x-2
Jet001 [13]

Answer:

no solution

Step-by-step explanation:

when you put in what y equals you get 2x-2=2x+7

8 0
3 years ago
A ferris wheel is 10 meters in diameter and boarded from a platform that is 5 meters above the ground. The six o'clock position
Murrr4er [49]

Answer:

The equation is:

f (t) = 4 + 5 (1 - cos (2pi t / 2))

Step-by-step explanation:

with the previous exercise we look for the equation for h = f (t)

So the data we have are

Wheel diameter = 10m (wheel radius = 5m)

1 wheel gets 1 revolution in 2 minutes.

the beginning of a entry will be related to that f (0) = 4

our wish is that f (z) get at least 4 with an amplitude of 5 (this value determines the radius of the wheel) for 2 minutes

with this the particle f (t) is transformed into

f (t) = 4 + 5 (1 - cos (2pi t / 2))

We know that the maximum value of cos in t will be 0, 1 -cos has minutes, the result will be as follows:

f (t) = 4 + 5 (1 - cos (2pi t / 2))

5 0
3 years ago
What is the equivalent fraction of 4/10?
VashaNatasha [74]
Divide both sides by 2.
2/5
:)
8 0
3 years ago
Read 2 more answers
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