IF THE CENTRAL ANGLE IN A CIRCLE IS 67 DEGREES, WHAT IS ITS INSCRIBED ARE MEASURE

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

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?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?