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motikmotik
3 years ago
5

samantha is savung up to bit a car it costs 3000 dollars she has 775 saved up and makes 150 a month how many more monsths will s

he have to work before she can buy the car
Mathematics
1 answer:
zzz [600]3 years ago
7 0
905 or 2045 because I think those are the right answer
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Tony is going to watch a movie in his collection. He has 3 action movies, 11 comedies, and 9 dramas. He will randomly select one
Nata [24]

Answer:

12/23

Step-by-step explanation:

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4 0
3 years ago
Evaluate using integration by parts ​
PolarNik [594]

Rather than carrying out IBP several times, let's establish a more general result. Let

I(n)=\displaystyle\int x^ne^x\,\mathrm dx

One round of IBP, setting

u=x^n\implies\mathrm du=nx^{n-1}\,\mathrm dx

\mathrm dv=e^x\,\mathrm dx\implies v=e^x

gives

\displaystyle I(n)=x^ne^x-n\int x^{n-1}e^x\,\mathrm dx

I(n)=x^ne^x-nI(n-1)

This is called a power-reduction formula. We could try solving for I(n) explicitly, but no need. n=5 is small enough to just expand I(5) as much as we need to.

I(5)=x^5e^x-5I(4)

I(5)=x^5e^x-5(x^4e^x-4I(3))=(x-5)x^4e^x+20I(3)

I(5)=(x-5)x^4e^x+20(x^3e^x-3I(2))=(x^2-5x+20)x^3e^x-60I(2)

I(5)=(x^2-5x+20)x^3e^x-60(x^2e^x-2I(1))=(x^3-5x^2+20x-60)x^2e^x+120I(1)

I(5)=(x^3-5x^2+20x-60)x^2e^x+120(xe^x-I(0))

Finally,

I(0)=\displaystyle\int e^x\,\mathrm dx=e^x+C

so we end up with

I(5)=(x^4-5x^3+20x^2-60x+120)xe^x-120e^x+C

I(5)=(x^5-5x^4+20x^3-60x^2+120x-120)e^x+C

and the antiderivative is

\displaystyle\int2x^5e^x\,\mathrm dx=(2x^5-10x^4+40x^3-120x^2+240x-240)e^x+C

8 0
3 years ago
How did American factories change during World War II to support the war effort?
shusha [124]

Step-by-step explanation:

Many Factories were converted into ammunition factorys and weapon factorys to support the war effort

3 0
3 years ago
Read 2 more answers
Please Help me.<br> .<br> .<br> .<br> .<br> .
avanturin [10]

Answer:

D

Step-by-step explanation:

x^2+2x-5-(-3x^2-4x+1)

x^2+2x-5+3x^2+4x-1

4x^2+6x-6

6 0
3 years ago
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I have one last question I need help with.
klio [65]
Just the first one, r is 4x+2, and h is 5x+4, plug them into the formula pls
7 0
3 years ago
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