Humans have known about magnets ____________________
A.
since the 12th century.
B.
since 1750.
C.
since 1902.
D.
for more than 2000 years

Humans have known about magnets FOR MORE THAN 2000 YEARS.

Question

Asked 4/2/2014 5:48:17 PM

Updated 4/2/2014 6:06:26 PM

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Humans have known about magnets FOR MORE THAN 2000 YEARS.

Added 4/2/2014 6:06:26 PM

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Solve the system of equations by using substitution.
–2x + 3y = 7
4x – 6y = 8
A.
y = –22, x = 29.5
B.
y = –22, x = –36.5
C.
y = –22, x = –31
D.
no solution

Question

Not Answered

Updated 3/26/2014 10:48:56 PM

1 Answer/Comment

–2x + 3y = 7,

-2x = 7 - 3y

x = (3/2)y - 7/2

Replace x in the equation 4x – 6y = 8, then 4(3/2y - 7/2) - 6y = 8

6y - 14 - 6y = 8, the simplified form is 0 = 22 which is not true.

Therefore, the solution for –2x + 3y = 7 4x – 6y = 8 is D. no solution.

-2x = 7 - 3y

x = (3/2)y - 7/2

Replace x in the equation 4x – 6y = 8, then 4(3/2y - 7/2) - 6y = 8

6y - 14 - 6y = 8, the simplified form is 0 = 22 which is not true.

Therefore, the solution for –2x + 3y = 7 4x – 6y = 8 is D. no solution.

Added 3/26/2014 10:48:56 PM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [3/26/2014 10:49:56 PM]

Translate the following into Latin: I carry **Weegy:** I carry in Latin is: porto (More)

Question

Expert Answered

Updated 3/29/2014 10:54:16 AM

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The Doppler Effect due to the moving of the source of a sound is the same as the Doppler Effect due to the moving of the listener.
A.
True
B.
False

Question

Not Answered

Updated 3/31/2014 7:04:16 AM

1 Answer/Comment

The Doppler Effect due to the moving of the source of a sound is the same as the Doppler Effect due to the moving of the listener.

True.

True.

Added 3/31/2014 7:04:16 AM

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At the edges of overlapping circular waves, interference produces a V shape called a ______________
A.
bow wave.
B.
shock wave.
C.
sonic boom.
D.
Doppler Effect
**Weegy:** At the edges of overlapping circular waves, interference produces a V shape called a BOW WAVE. (More)

Question

Expert Answered

Updated 3/31/2014 7:35:20 AM

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When a pathway through which charges can move forms suddenly, you get ____________________________
A.
electrical force.
B.
electrical field.
C.
electrical discharge.
D.
induction

Question

Not Answered

Updated 4/1/2014 5:34:25 AM

1 Answer/Comment

When a pathway through which charges can move forms suddenly, you get electrical discharge.

Added 4/1/2014 5:34:25 AM

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