Rosie is x years old Eva is 2 years older Jack is twice Rosie’s age A) write an expression for the mean of their ages. B) the total of their ages is 42 How old is Rosie?

Question

asked Apr 22, 2024 186k views

1 Answer

Kaes · Answer 1 · 2024-04-27T21:39:58+0000

Answer:

Rosie is 10 years old

Explanation:

A)

Rosie is x years old

Rosie's age (R) = x

R = x

Eva is 2 years older

Eva's age (E) = x + 2

E = x + 2

Jack is twice Rosie’s age

Jack's age (J) = 2x

J = 2x

B)

R + E + J = 42

x + (x + 2) + (2x) = 42

x + x + 2 + 2x = 42

4x + 2 = 42

4x = 42 - 2

4x = 40

$x = (40)/(4) \\\\x = 10$

Rosie is 10 years old