What numbers are 0.6 unit from 1.3 on a number line

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

What is the ordered pair of m’ after point m (5, 6) is rotated 90° counterclockwise?