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3 years ago

Solve the system: X + 2y=28 Y= 3x

Mathematics

1 answer:

DochEvi [55]3 years ago

7 0

Answer:

x=4 and y=12

Step-by-step explanation:

x+2(3x)=28

x+6x=28

7x=28

x=4

y=3(4)

y=12

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Answer:

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2 years ago

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3 years ago

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2 years ago

Billy has 1 gallon of paint. He is going to pour it into a paint tray that measures 10 inches wide, 14 inches long, and 4 cm dee

V125BC [204]

Answer:

The paint will not fill the tray by 10.53 cubic inches.

Step-by-step explanation:

We will find the volume of the paint tray and compare it with the volume of the gallon.

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3 years ago

Integrate [0, 1/2] xcos(pi*x).

elena-14-01-66 [18.8K]

To answer your question, this could be the possible answer and i hope you understand and interpret it correctly:
<span>[Integrate [0, 1/2] xcos(pi*x
let u=x so that du=dx
and v=intgral cos (xpi)dx
v=(1/pi)sin(pi*x)
integration by parts
uv-itgral[0,1/2]vdu just plug ins
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(1/pi)x sinpi*x - (1/pi)[-(1/pi) cos pi*x] from 0 to 1/2
=(1/2pi)+(1/pi^2)[cos pi*x/2-cos 0]
=1/2pi - 1/2pi^2
=(pi-2)/2pi^2 ans</span>

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3 years ago