Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Material A costs $3 per kilogram, and material B costs $5 [#permalink]
19 Jun 2008, 06:24
0% (00:00) correct
0% (00:00) wrong based on 0 sessions
This topic is locked. If you want to discuss this question please re-post it in the respective forum.
Material A costs $3 per kilogram, and material B costs $5 per kilogram. If 10 kilograms of material K consists of x kilograms of material A and y kilograms of material B, is x > y? (1) y > 4 (2) The cost of the 10 kilograms of material K is less than $40.
A - easy to eliminate b/c it does not relate anything to the cost which is the ratio that we need to relate to. = insuff B - I approached it this way: What are the possibilities of A and B. I tend to start with the equality to see if it works or on which side it will fall. So A = 5 and B = 5. => (5*5) + (3*5) = 25 + 15 = 40. So if they are equal it will be $40. The only way to get it to be <$40 is to have more B than A. So we have enough to solve. Suff