Posted by Amber on Monday, November 16, 2009 at 7:20am.
At noon a private plane left Austin for Los Angeles, 2100 km away, flying at 500km/h. One hour later a jet left Los Angeles for Austin at 700 km/h. At what time did they pass each other?

Math, not "9th grade"  Writeacher, Monday, November 16, 2009 at 8:01am
Assistance needed.
Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.

9th grade  bobpursley, Monday, November 16, 2009 at 10:56am
The fly a combined 2100km
2100km=500km/hr*time1 + 700km/hr*time2
but time2=time11
2100=500*time1+700(time11)
now solve for time 1

9th grade  Timothy, Tuesday, January 19, 2010 at 7:40pm
The equation to simply put words into numbers would be....."500x + 700x  700 = 2100".....
Then if you solved for "x", you would get x=7/3.
So the plane and jet will meet in 7/3 hours. If yoy add that to 12:00 PM being noon, you would get 2:20, so the plane and the jet will meet at 2:20 PM.
Answer This Question
Related Questions
 Algebra  At noon a private plane left Austin for Los Angeles, 2100 km away, ...
 Freshman Algebra  Using a chart: At noon a private plane left Austin for Los ...
 math  A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later...
 math  A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later...
 math  A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later...
 Math  A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later...
 math  There are 2 trains, one in Los Angeles and the other one in Denver. Train...
 English  Mr. And Mrs. Sanchez were married On Nov 12 1988 Comma after 12 We met...
 Math  The table shows the times a train left Austin and arrived in San Antonio ...
 Economics  Opera CD buyers are located in New York and Los Angeles. At the ...
More Related Questions