Convert to Interval Notation g-28<=1

$g - 28 \leq 1$

Move all terms not containing $g$ to the right side of the inequality.

Add $28$ to both sides of the inequality.

$g \leq 1 + 28$

Add $1$ and $28$ .

$g \leq 29$

Convert the inequality to interval notation.

$(- \infty, 29]$