Avending machine accepts nickels, dimes, and quarters. exact change is needed to make a purchase. how many ways can a person with 4 nickels, 3 dimes, and 2 quarters make a 55-cent purchase from the machine?

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?