The graph shows the distance y, in centimeters, a pendulum moves to the right (positive displacement) and to the left (negative
displacement), for a given number of seconds x.
How many seconds are required for the pendulum to swing from its position furthest to the right to its position furthest to the left?
How many seconds are required for the pendulum to swing from its position furthest to the right to its position furthest to the left?
1 answer:
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Answer: C: 12-7x
Step-by-step explanation:
This expression is a good example of the difference of two squares, as 144 is the square of 12, while 49x² is the square of 7x.
Any difference of two squares can be factored into the sum of their square roots times the difference of their square roots
.
Let's factor our expression.
Out of all the options given, only is a factor. Hence, option C is correct.