Adoctor’s office schedules 15-minute appointments and half-hour appointments for weekdays. the doctor limits these appointments to, at most, 30 hours per week. write an inequality to represent the number of 15-minute appointments x and the number of half-hour appointments y the doctor may have in a week.
a.
15x + 30y < 30

b.
15x + 30y < 1800

c.
15x + 30y > 1800

d.
15x + 1/2 y < 30