A boat travelled 6km upstream at X km/h. How long did the journey take? When returning downstream, the speed of the boat was 2X km/h. How long did the return journey take? If the downstream journey took 15 min less than the upstream journey, form an equation for X and solve it.

Which speed is the fastest (use 1 mile ≈ 1.6 kilometers)? a. 12 miles/hour b. 18 feet/second c. 19 kilometers/hour d. cannot be determined

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?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)