<span>An extraneous solution is a solution, such as that to an equation, that emerges from the process of solving the problem but is not a valid solution to the original problem.
Given the equation:

From the equation, it is obtained that x = 1 and x = -4 are the solutions of the equation.
Now, we substitute x = 1 into the equation as follows:
</span><span>

As can be see, for x = 1, the equation is undefined.
Now, we substitute x = -4 into the equation as follows:

It can be seen that x = -4 is a valid solution of the orignal equation.
Therefore, x = 1 is an extraneous solution to the equation

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Take 15% of 400, or 0.15 x 400
0.15 x 400 = 60
However, $60 is only the 15%.
Now, take away 60 from 400.
400 - 60 = 340.
So $340 went towards the trip.
<span>The answer is letter c which is blank endorsement. It is a sign
by the maker of an instrument, for instance a check, which allows any holder of
the instrument to declare a claim for payment. Since no payee is stated,
such an endorsement fundamentally
turns the instrument into a bearer security.</span>