Let x=number of cds and y=number of dvds
use x+y=40 and 4x+6y=180 as your systemand solve each for y.

Answer question above and explain each step : )

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

To prove that def ~ gfh by the sss similarity theorem using the information provided in the diagram, it would be enough additional information to know that