If f(x) = 3x − 2, what is f(4)?
Answer and explanation
Correct answer: A. 10
- Step 1: Substitute x = 4: 3·4 − 2. Step 2. 12 − 2 = 10. Answer: 10. Why not the others: 14 adds 2, 12 forgets the subtraction and 6 subtracts 2 before multiplying.
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