Triangle BCD is similar to triangle FHE. Write as many equivalent ratios as you can based on the diagram.

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

The roof of a farm silo is the shape of a hemisphere and is made of sheet tin. if the diameter of the silo is 126.5 feet, how much sheet tin is needed to make the roof? (use π = 3.1416.)