Find the slope and y intercept of each line
NEED HELP ASAP!!

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

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Is the square root of 4 plus the square root of 16 rational?