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(7500-2v1) = v1 + 15000 - 4v1 = 9000

=> 3v1 = 15000 - 9000 = 2000

=>v1 = 2000 lines/min

v2 = 7500-2*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(7500-2v1) = 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

- Pre-calculus - Find the slope of the line passing through the points at (a, a+3...
- Pre-calculus - 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=y-12 = 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