Need helpcan’t find answer to problem to hard

Solve the system by the elimination method. x + y - 6 = 0 x - y - 8 = 0 when you eliminate y , what is the resulting equation? 2x = -14 2x = 14 -2x = 14

: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?

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?