Question

Which expression has a value less than the given expression when x = 5?

3x + 15



2x²
x² + 5
3(x + 5)
4x + 5

Answer 1

4x + 5

Explanation:

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Answer 2

Put the value of x = 5 to the expression:

3x + 15 → 3(5) + 15 = 15 + 15 = 30

2x² → 2(5)² = 2(25) = 50 > 30

x² + 5 → 5² + 5 = 25 + 5 = 30

3(x + 5) → 3(5 + 5) = 3(10) = 30

4x + 5 → 4(5) + 5 = 20 + 5 = 25 < 30

Answer: 4x + 5