The mechanical advantage of a compound machine is related to the mechanical advantage of all the simple machines involved. True False
TRUE. The mechanical advantage of a compound machine is related to the mechanical advantage of all the simple machines involved.
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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. (More)
Question
Updated 3/13/2016 7:21:43 PM
A bicycle is a compound machine. TRUE.

Confirmed by Andrew. [3/13/2016 7:22:02 PM]
A lawn mower is an example of a compound machine. TRUE.

Confirmed by Andrew. [3/13/2016 7:22:18 PM]
The elbow is an example of a simple machine in the human body. True False
Weegy: The answer is True. The elbow is an example of a simple machine in the human body. (More)
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The ordered pair (-1, -1) is a solution of the system -4x + 2y = 2 and x + y = -2. True False
Question
Updated 7/13/2018 12:07:30 PM
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
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