All of the following represent the same expression except . a: -8 · a · b
b: -8 ab
c: 8 - ab
d: -8( a )( b )

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?

What is best way to getting answer for my exam is

Which one ? is the answer and how to find this answer