The mean age of 5 people in a room is 27 years. A person enters the room.
The mean age is now 35.
What is the age of the person who entered the room?

main age = total age/total people

if Main age is = 27

and x = 135

Total age is = 135

then main age is 35

and y = 210

first main age - second main age = age of the person participating

210 - 135 = 75

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Step-by-step explanation:

GREETINGS FROM TURKEY

i dont get it. where are the "descriptions"?

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3