To figure this out you first find the difference between -18 and 60, which is 78 you then just divide, 78/4.5 which is approximately 17.55 mins or 17.6 rounded.
Answer:
It's not clear on what it means but the information given it would just be 20*3=60
Step-by-step explanation:
The length of the third side is about 7.81 inches and the perimeter of the triangle is about 18.81 inches
17.549 is 17.54 rounded to the nearest hundredth
