What decimal completes the equation? ) please help!!)

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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