Tommy is buying used books for school. the price of the books is $180. he uses the 30%-off student discount and there is a 4% sales tax.

Find the difference (8ab+a+2) - (3ab+6)

When y’all answer can y’all explain too !

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?