In 2 years, my sister will be twice as old as she was 2 years ago, and in 3 years my brother will be three times older than he was 3 years ago. Which sibling is older?

Sister

Step-by-step explanation:

Let the sister’s age be x.

Let the brother’s age be y.

2 + x = 2x - 2

3 + y = 3y - 3

Solve the first equation.

x - 2x = - 2 - 2

-x = -4

x = 4

Solve the second equation.

y - 3y = -3 - 3

-2y = -6

y = 3

The sister is 4 years old.

The brother is 3 years old.

The sister is older than the brother.

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify

answer: idk

step-by-step explanation: