Answer
a. $\gt$
b. $\lt$
c. $\gt$
Work Step by Step
a. $0 \gt -5$ because $-5$ is further away from 0 on the number line.
b. $-3\lt3$ since any negative number is $\lt$ a positive number. They are both the same distance from 0, but 3 is still $\gt-3$
c. -7 $\gt-12$ -7 is greater than -12 since it is closer to 0 on the number line, so -7 $\gt$ -12