2 years ago

ANSWER RIGHT NOW PLS!! Add. −12+(−20) Enter your answer in the box.

Mathematics

1 answer:

UkoKoshka [18]2 years ago

8 0

Answer:

-32

Step-by-step explanation:

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Differential Equations Problem

fgiga [73]

Answer:

$y=\frac{t^2e^{2t}}{3}+ce^{2t}$

Step-by-step explanation:

We have given differential equation $\frac{dy}{dt}-2y=t^2e^{2t}$

We know that linear differential equation is given by $\frac{dy}{dt}+Py=Q$

On comparing with standard equation P = -2 and Q= $t^2e^{2t}$

Now integrating factor $IF=e^{-Pdt}$

$IF=e^{-2dt}=e^{-2t}$

Now solution of differential equation is given by

$y\times IF=\int\ IF\times Q\ dt$

$y\times e^{-2t}=\int\ e^{-2t}\times t^2e^{2t}\ dt$

$y\times e^{-2t}=\frac{t^2}{3}+c$

$y=\frac{t^2e^{2t}}{3}+ce^{2t}$

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3 years ago

−2 1/4=r−4/5<br><br> What is r?

dmitriy555 [2]

Answer:

r = -29/20 or r = -1.45

Step-by-step explanation:

I believe you are saying that the equation is -2 1/4 = r - 4/5. If so, then I would solve it in this way:

-2 1/4 = r - 4/5

-9/4 = r - 4/5

-9/4 (20) = r (20) - 4/5 (20)

-45 = 20r - 16

20r = -29

r = -29/20

r = -1.45

Check:

-2 1/4 = r - 4/5

-9/4 = r - 4/5

-2.25 = r - 0.8

-2.25 = -1.45 - 0.8

-2.25 = -2.25

-9/4 = -9/4

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3 years ago

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Harrizon [31]

Answer:

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Step-by-step explanation:

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2 years ago

What is the perimeter of the rectangle? Write your answer in scientific notation

marissa [1.9K]

The formula is 2(l+w)

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3 years ago

Please help, will give brainiest IF correct !! 40 points

erastova [34]

Answer:

nine over eleven because its ez

Step-by-step explanation:

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1 year ago

Read 2 more answers