Although it may seem obvious from the diagram of rectangle ABCD pictured, ADMC is isosceles. Explain why this must be true

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?

Me asap! what is the slope of this line? enter your answer in the box.

Ihave trouble finding the nth term of a linear sequence