What is the value of ab/c if a=4,b= -5, and c = -2

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

Which expression gives the area of the triangle shown below

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