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3 years ago

Solve for y a. 4x + 5y = 25

Mathematics

1 answer:

AfilCa [17]3 years ago

5 0

Answer:

y = -4/5x + 5

Step-by-step explanation:

In order to solve for y, we need to isolate the variable. First, let's subtract 4x on each side. After doing said step, we should now have this equation:

5y = -4x + 25

Next, we need to divide 5 on each side, giving us this new equation:

y = -4/5x + 5

There you go! Let me know if I did anything wrong ^-^

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Write an equation for a line parallel to y=5x+4 and passing through the point (4,25)

Soloha48 [4]

Answer:

y = 5x + 5

Step-by-step explanation:

m = 5

y = mx + b

25 = 5(4) + b; b = 5

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3 years ago

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Using Newton's Law of Cooling. You are a medical examiner called to an abandoned house in which a dead body has been discovered.

Artyom0805 [142]

A) The differential equation comes from the fact that the rate of temperature change is proportional to the difference in temperatures.
$\frac{dT}{dt} = \alpha(T -52)$

B) Find general solution by separating variables and integrating $\int\frac{dT}{T-52} = \alpha \int dt \\ ln (T-52) = \alpha t + C \\ T = C e^{\alpha t} +52$ :

C) Initial condition is t=0, T = 87
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D) Total time elapsed is 10 minutes, new temperature is 84
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E) Temperature function is:
$T = 35 e^{-.00896 t} +52$
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$t = \frac{ln (\frac{T-52}{35})}{-.00896}$
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3 years ago

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natulia [17]

Answer:

Step-by-step explanation:

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<u>Substitute x into the expression:</u>

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3 years ago

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