Question

in five games you score 16/12/15 13 and 17 points. write and solve an inequality to determine how many points you must score in the sixth game to have an average of at least 15 points.

Answer 1

You will need to find the average of the 6 games, then you will use the greater than or equal sign, since you have to have "at least" that score to average 15.
(16 + 12 + 15 + 13 + 17 + x) / 6 ≥ 15

Answer 2

(16+12+15+13+17+p)/(5+1)
`\geq`15

(73+p)/6
`\geq`15

73+p
`\geq`90

p
`\geq`17