1. 

   math_celebrity Administrator Staff Member

   The sum of x and y doubled
   
   The sum of x and y: x + y
   
   Double it
   2(x + y)

    

   math_celebrity, Jan 18, 2017

   #1
   
   

• Log in with Facebook
• Log in with Twitter

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in