Six more than five times a number (x) is at least 21

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Aline is perpendicular to another line m2= (-1/m1), where m1 is the slope of the original line and m2 is the slope of the perpendicular line. which of the following equations represents the line that passes through the point (-2,1) and is perpendicular to the line below?

The sum of five and a number n is at least 12