Alvin's age is two times elga's age. the sum of their ages is 63. what is elga's age?

Alvin = 42 yrs , Elga = 21 yrs

Step-by-step explanation:

Let Elga's age be x , and Alvin's age be y ,since Alvin is two times Elga's age , then

Alvin's age = 2x , that is

y = 2x equation 1

The sum of their ages is 63 implies

x + y = 63 equation 2

Solving the resulting linear equations by substitution method.

Substitute equation 1 into equation 2 , we have

x + 2x = 63

3x = 63

x = 63/3

x = 21

Therefore : Elga is 21 years old , then Alvin will be 21 x 2, which will be 42

correct

step-by-step explanation:

two data sets with the same median will not have the same varaibility

step-by-step explanation: