Need help finding set in vinn diagram

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

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?