Function Expressions

$f\left(x\right)=5x-12$ What is $f\left(-4\right)$

• -32

• -3

• -12

• 3

• 2x

• -3

• 3

• 10

If f(x) = 2x+1, what would the function look like once you substitute in a 1 to find f(1)?

• f(x) = 21+1

• f(1) = 2 (1) + 1

• f(1) = 2x (1) + 1

What is f(6) for the function f(x)=3x-8

• -8

• 10

• -144

• answer not here

Complete the operation and evaluate.

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What is the value of x in:
f(4) = 3x - 1

• 11

• 4

• -1

• 0

If f(12) = 4(12) – 20, which function gives f(x)?

• f(x) = 4x

• f(x) = 12x

• f(x) = 4x - 20

• f(x) = 12x - 20

What is the value of 2f(1)+f(-1)-f(3)?

• 9

• 8

• 0

• None of these

What is f(5) for the function f?

f(x) = 2(x - 7)

• 3

• -4

• -3

• 1