Function Operations Answers

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Which expression is equivalent to (st)(6)?

s(t(6))

s(x) × t(6)

s(6) × t(6)

6 × s(x) × t(x)

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

–169

–1

104

If f(x) = 16x – 30 and g(x) = 14x – 6, for which value of x does (f – g)(x) = 0?

–18

–12

If p(x) = x2 – 1 and , which expression is equivalent to (p – q)(x)?

5(x – 1) – x2 – 1

(5x – 1) – (x2 – 1)

(x2 – 1) – 5(x – 1)

(x2 – 1) – 5x – 1

If f(x) = 8 – 10x and g(x) = 5x + 4, what is the value of (fg)(–2)?

–196

–168

Which expression is equivalent to (f + g)(4)?

f(4) + g(4)

f(x) + g(4)

f(4 + g(4))

4(f(x) + g(x))

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

–4

–2

If and , what is the value of (f – g)(144)?

–84

–60

Which expression is equivalent to ?

f (5) times g (5)

f (5) + g (5)

5 f (5)

5 g (5)

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

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