What is the greatest number of groups 12 coaches and 42 played is used for

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Candy lives in the center of town. her friend darlene lives 28 miles to the east and her friend dana lives 21 miles north. approximately how far do dana and darline live apart ?

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.