The elbow is an example of a simple machine in the human body.
True
False

The answer is True. The elbow is an example of a simple machine in the human body.

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Asked 1/31/2013 2:07:49 PM

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The mechanical advantage of a compound machine is related to the mechanical advantage of all the simple machines involved.
True
False **Weegy:** TRUE. The mechanical advantage of a compound machine is related to the mechanical advantage of all the simple machines involved. (More)

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Asked 1/31/2013 1:29:28 PM

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A bicycle is a compound machine. True False User: A lawn mower is an example of a compound machine.
True
False
User: Which of the following explains why a bicycle uses a gear?
a. The gear increases the effort force needed.
b. The gear increases resistance force.
c. The gear decreases effort force.
d. The gear decreases resistance force.
**Weegy:** The following explains why a bicycle uses a gear: The gear decreases effort force.
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Updated 3/13/2016 7:21:43 PM

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A bicycle is a compound machine. TRUE.

Added 3/13/2016 12:59:00 PM

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Confirmed by Andrew. [3/13/2016 7:22:02 PM]

The ordered pair (-1, -1) is a solution of the system -4x + 2y = 2 and x + y = -2.
True
False

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Updated 7/13/2018 12:07:30 PM

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The ordered pair (-1, -1) is a solution of the system -4x + 2y = 2 and x + y = -2. TRUE.

-4x + 2y = 2 ;

y = -x - 2 ;

-4x + 2(-x - 2) = 2 ;

-4x - 2x - 4 = 2 ;

-6x - 4 = 2 ;

-6x = 2 + 4 ;

-6x = 6 ;

x = 6/-6 ;

x = -1 ;

y = -(-1) - 2 ;

y = 1 - 2 ;

y = -1 ;

Solution set: x = -1, y = -1

-4x + 2y = 2 ;

y = -x - 2 ;

-4x + 2(-x - 2) = 2 ;

-4x - 2x - 4 = 2 ;

-6x - 4 = 2 ;

-6x = 2 + 4 ;

-6x = 6 ;

x = 6/-6 ;

x = -1 ;

y = -(-1) - 2 ;

y = 1 - 2 ;

y = -1 ;

Solution set: x = -1, y = -1

Added 7/13/2018 12:07:30 PM

This answer has been confirmed as correct and helpful.

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