Abox contains n quarters and some dimes. the ratio of quarters to dimes is 1: 2.
a) write an expression for the total amount of money in the box.

b) if there are 12 quarters, find the total amount of money in the box.

Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation