Expand the numbers and multiply.
56=
+
x7=x 7
=
+

How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

What is the missing constant term in the perfect square that starts with x^2 -20x

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.