What is the greatest common factor of 34 and 51

In the diagram below, tan θ = sqrt 3. what is the value of m?

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

2/3(-6y+9x) expand each expression using the distributive property