17x(8-5)x5 plz help me by solving this plz

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?