Classify the polygon. Then determine whether it appears to be regular or not regular
heptagon; regular
octagon; regular
nonagon; not regular
octagon; not regular

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

If the value of x increases by 5, how does the value of m(x + 3) change? a) it increases by 5m. b) it increases by 8m. c) it decreases by 5m. d) it decreases by 8m.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?