an air traffic controller is tracking two planes. To start, plan A is at an altitudeof 5000 feet and Plan B is at an altitude of 4268 feet. Plan A is gaining altitude at 40.25 feet per second and Plan B is gaining at 55.5 feet per second. how many seconds will pass before the planes are at the same altitude? what will their altitude be when they're at the same altitude?

It took a salmon 45 seconds to swim upstream to a certain spot. The salmon then turned around to swim with the current and arrived at its starting place in 17 seconds. If the current in that part of the stream is 0.43 meters per second, what was the speed of the salmon?

Gabriel drives 40 miles at a certain speed. Hitting serious traffic, he is forced to drive at a speed that is 60 mph slower. He drives at this new speed for 50 miles. If the entire trip takes 3 hours, what is his speed during each part of the trip?

The speed of the​ river's current is 5 mph. If a boat travels 20 miles downstream in the same time that it takes to travel 10 miles​ upstream, find the speed of the boat in still water. If a person rows to his favorite fishing spot 10 miles downstream in the same amount of time that he rows 5 miles upstream and if the current is 5 ​mph, find how long it takes him to cover the 15 miles. Smith Engineering is in the process of reviewing the salaries of their surveyors. During this​ review, the company found that an experienced surveyor can survey a roadbed in 6 hours. An apprentice surveyor needs 8 hours to survey the same stretch of road. If the two work​ together, find how long it takes them to complete the job.

on a 123-mile trip from Location A to Location B, Abby drove 10 miles per hour slower than she did on her 180-mile trip from Location C to Location D. The first trip (A-B) took 1 hr 40 mins longer than the second trip (C-D). how fast did abby drive on her first trip(A-B)?

In a 16 km cross-country ski race Brett skied the first 7 km at a constant speed and then increased his speed by 3 km/h for the last 9 km. If he finished the entire race in 1 hour and 20 minutes, what was his speed for the first 7 km?

The distance that Brad travels varies directly with the time spent traveling. Brad traveled 660 miles in 12 hours How many miles could Brad travel in 4 hours?

PLEASE EXPLAIN EVERY STEP

A local bus finishes its 77-km route in the same amount of time that an express bus finishes its 105-km route. The local bus averages 12 kph slower than the express. How long does it take each bus to finish its route?

The time required for a trip of a certain distance in a car varies indirectly as the rate the car travels. A trip took 18 hours traveling at 50 miles per hour. How long would this trip take if the car was traveling at 75 miles per hour?