Given:
The mean age of 5 people in a room is 26 years.
A person enters the room. The mean age is now 33.
To find:
The age of the person who entered the room.
Solution:
Formula for mean:

The mean age of 5 people in a room is 26 years.



The mean age is now 33. It means, the mean age of 6 people is 33.



Now, the age of the person who entered the room is
Required age = Sum of ages of 6 people - Sum of ages of 5 people
= 
= 
Therefore, the age of the person who entered the room is 68 years.
Imani's time=4 times carissa's time
=28 min
there fore, i=4*c=28
c=i/4;=>28 divided by 4 which is 7 min
Answer:
837150
/7
Step-by-step explanation:
459(
569
/7
)+997
=
830171
/7
+997
=
837150
/7
Sum of all interior angles of a polygon
180( n - 2) where n = number of sides in the polygon
now, if n = 19, the polygon has 19 sides, then 180( 19 - 2)
You can use a calculator, or use long division