There are 30 students in a class and x of them are boys. Write down an expression for number of girls in the class.​

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

Iam at home. /: i am playing video games. translate the following statement into symbolic form.