Posted by Anonymous on Tuesday, March 31, 2009 at 7:56pm.
Together, two printers can print 7500 lines if the first printer prints for 2 minutes and the second prints for 1 minute. If the first printer prints for 1 minutes and the second prints for 2 minutes, they can print 9000 lines together. Find the number of lines per minute that each printer prints.
My answer:
let first print speed: v1 (limes/min)
second print speed : v2 (lines/min)
2v1+v2 = 7500 lines =>v2 = 7500  2v1
v1 + 2v2 = 9000 lines
=> v1 + 2(75002v1) = v1 + 15000  4v1 = 9000
=> 3v1 = 15000  9000 = 2000
=>v1 = 2000 lines/min
v2 = 75002*v1 = 7500  2*2000 = 3500 lines/min
answer:
first print speed: 2000 lines/min
second print speed: 3500 lines/min
Check please, I'm not too good at word problems!

Pre Cal.  Reiny, Tuesday, March 31, 2009 at 8:06pm
you did fine
the only thing I would object to is your running of the equal sign across the page.
here is how it should be presented:
v1 + 2v2 = 9000
v1 + 2(75002v1) = 900
v1 + 15000  4v1 = 9000
7500 = 3v1
v1 = 3500
etc.
each line should contain only one equal sign, it makes it so much easier to read.
Answer This Question
Related Questions
 Precalculus  Find the slope of the line passing through the points at (a, a+3...
 Precalculus  Find the slope of the line passing through the points at (a, a+3...
 Precalculus with applications  Together, two printers can print 7500 lines if ...
 Algebra  A company has two printers. Printer A prints a pages per minute, and ...
 algerbra 2  if a jet printer prints an articlae in 12 minutes and a laser ...
 Math  Ivana's printer prints 40 pages in 5 minutes. How many pages will the ...
 Math  Can you please check my answers, thank you #2. 5/y+4 + 11/y^2=y12 = 7/y...
 Reading  41. Choosing the Resolution for Your Photos Resolution Purpose L (...
 math  ART An artist is going to sell two sizes of prints at an art fair. The ...
 English  41. Choosing the Resolution for Your Photos Resolution Purpose L (...
More Related Questions