
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
May 5th, 2017, 10:18 PM  #1 
Senior Member Joined: Jan 2017 From: US Posts: 104 Thanks: 5  How To Construct This Equation
I think this is fairly simple, I just want to make sure I set up the equation right: A jet can fly 300 miles in the same time that it takes a prop plane to travel 120 miles. If the prop plane travels at a speed of 90 mph slower than the jet, find the speed of the jet. I'm guessing the y=k(x) formula would apply here? 
May 6th, 2017, 02:11 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 18,551 Thanks: 1479 
As 300 miles is 180 miles greater than 120 miles, the journeys would take (180/90) hours, which is 2 hours. Hence the jet flies at 150mph and the prop plane at 60mph. The above uses the time = distance/speed and speed = distance/time relationships, which are essentially equivalent to distance = speed × time. 
May 7th, 2017, 12:35 AM  #3  
Senior Member Joined: Jan 2017 From: US Posts: 104 Thanks: 5  Quote:
 

Tags 
algebra, construct, equation, inverse variation 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
construct a matrix  Shankar  Algebra  5  October 26th, 2015 10:51 AM 
How to construct this argument  king.oslo  Real Analysis  1  July 7th, 2015 05:31 PM 
construct a segment  Albert.Teng  Algebra  2  February 2nd, 2014 08:16 PM 
What is a basis? How to construct one?  dervast  Linear Algebra  4  December 7th, 2010 01:58 AM 
help to construct a set  multiverse  Applied Math  0  July 13th, 2010 02:51 AM 