Can someone help me? Please

Three coins are flipped. what is the probability that there will be at least two tails?

Find the value of x for which the lines are parallel.

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?