Simplify: 3m + 7 + 2m

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

: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?

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?