For a given input value u, the function h
outputs a value v to satisfy the following
equation.
4u + 8v = -3u + 2v
write a formula for h(u) in terms of u.
h(x) =

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

: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?

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)