Can someone me with this? i can't really find a pattern in the

What is the measure of ac? 5 units 13 units 26 units 39 units

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55