x > 0: x < 50 (option C)
Step-by-step explanation:
Slower than 50 miles per hour means he is at a speed less than 50 miles per hour
Speed cannot be negative. As a result his speed will be greater than 0 miles per hour
let his speed be x
We can say his speed would be greater than 0 but less than 50
Representing the above with mathematical symbol:
x > 0 but < 50
x > 0: x < 50 (option C)