Isabel had 21 coins in her collection. Frank had 3 times as many coins as Isabel had. Which equation can be used to determine the number of coins Frank had? * 21 ÷ _?_ = 3
3 x 21 = _?_
21 + 3 = _?_
3 + _?_ = 21

Two positive integers are 3 units apart on a number line. their product is 108. which equation can be used to solve for m, the greater integer? m(m – 3) = 108 m(m + 3) = 108 (m + 3)(m – 3) = 108 (m – 12)(m – 9) = 108

Can someone check if i did this correct. it’s number 4 if you’re wondering.

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?