True of false? velocity and acceleration

[hannah2329]

Homework Statement

a negative acceleration must mean an object is slowing down.
if an object has a negative velocity and a negative acceleration the object is slowing down.
distance can never be negative
if an object has a negative velocity and a positive acceleration the object is speeding up.

Homework Equations

The Attempt at a Solution

true?
not sure at all
true?
false?

 

[fss]

Explain what you think the answer is and why.