Prove that quaternion group Q8 is nilpotent

This is different from the first one can someone me

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.