20 is 16% of what number?

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Based on the diagram, match the trigonometric ratios with the corresponding ratios of the sides of the triangle. tiles : cosb sinb tanb sincposs matches: c/b b/a b/c c/a

: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?