Mathematics knowledge · Difficulty 3
Try this ASVAB-style question.
Choose your answer before opening the explanation. This original practice item is for preparation and does not reproduce an official test question.
Which expression equals 3(x + 3)?
- x + 9
- 6x
- 3x + 9
- 3x + 3
Reveal answer and explanation
3x + 9
Use the distributive property: 3 × x + 3 × 3 = 3x + 9.