A number xxx added to 7 is at most 15. Which inequality represents this?
x+7≥15x + 7 \geq 15x+7≥15
x+7<15x + 7 < 15x+7<15
x+7>15x + 7 > 15x+7>15
x+7≤15x + 7 \leq 15x+7≤15