Find an equation of the line that satisfies the given conditions. through (9, 7); perpendicular to the line y = 5

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )

Can someone me with these two circle theorem questions asap?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?