Its right.................
The perimeter of the triangle with those given lengths is
Answer:

Step-by-step explanation:
we know that
To determine how many degrees drop the temperature, find out the absolute value of subtract the temperature at 8 am from the temperature at 3 pm.
so

Mean = (18 + 21 + 17 + 24 + 15) divided by 5
Mean = 95 divided by 5
Mean = 19