Answer:
A. 20cm hope this helps
Step-by-step explanation:

let the solution be 
let the solutions be a = 3, b = 1
is the equation with consistent value.
Max' brother is M-6 years old.
Answer:
6 x 2 1/2 + 4 ??? I hope this is correct :)
Step-by-step explanation:
If its not.. I'm so sorry:(
Have a nice day! <3
Answer:
I think it is b
Step-by-step explanation:
I hope this is correct