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Answers by Reilly B.

Discontinuities in functions are apparent "holes" in a function where no output value (f(x) also known as y) exists for a particular input value (x). In problems like yours, where there is a polynomial in the numerator (x + 7) and another polynomial in the denominator (x^2 - 49),...

If it helps at all, the reason you can re-order the terms in the problem is because you can think of subtraction as adding negative numbers: 9x + 2 - 5x - 3 = 9x + 2 + (-5x) + (-3) Because of the commutative property of addition, we can re-order these terms in...