Is a ratio of 2 to 3 equal to a ratio of 2 to 5

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?