Unit Test — Unit test Answers

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If and g(x) = 5x – 4, what is the domain of ?

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Which function has an inverse that is also a function?

{(–1, –2), (0, 4), (1, 3), (5, 14), (7, 4)}

{(–1, 2), (0, 4), (1, 5), (5, 4), (7, 2)}

{(–1, 3), (0, 4), (1, 14), (5, 6), (7, 2)}

{(–1, 4), (0, 4), (1, 2), (5, 3), (7, 1)}

Which function has an inverse that is also a function?

{(–4, 3), (–2, 7), (–1, 0), (4, –3), (11, –7)}

{(–4, 6), (–2, 2), (–1, 6), (4, 2), (11, 2)}

{(–4, 5), (–2, 9), (–1, 8), (4, 8), (11, 4)}

{(–4, 4), (–2, –1), (–1, 0), (4, 1), (11, 1)}

If f(x) = x2 – 2x and g(x) = 6x + 4, for which value of x does (f + g)(x) = 0?

–4

–2

If f(x) = 3x2 + 1 and g(x) = 1 – x, what is the value of (f – g)(2)?

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