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by den99
Fri Jan 27, 2012 8:40 am
Forum: Advanced Algebra ("pre-calculus")
Topic: Lift capacity: 75S + 125B <= 750
Replies: 1
Views: 2412

Lift capacity: 75S + 125B <= 750

Could someone help me with this ? 75S + 125B\leq 750 The capacity in pounds of the lift used by a roofing company to place roofing shingles and buckets of roofing nails on rooftops is modeled by the formula shown, where S represents packs of shingles and B represents buckets of nails. Use the formul...
by den99
Wed Jan 25, 2012 1:04 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: Mixed exercise: combining 4 solns of expensive chemical
Replies: 1
Views: 3170

Mixed exercise: combining 4 solns of expensive chemical

Anybody can help me with this ? A chemist has four solutions of a very rare and expensive chemical that are 15% acid (cost $120 per ounce), 20% acid (cost $180 per ounce), 35% acid (cost $280 per ounce) and 45% acid (cost $359 per ounce). She requires 200 oz of a 29% acid solution. Find the combinat...
by den99
Thu Jan 19, 2012 6:55 am
Forum: Advanced Algebra ("pre-calculus")
Topic: Precalculus books: why answers only for odds?
Replies: 2
Views: 2143

Re: Precalculus books: why answers only for odds?

well i'm doing it all on my own, os there is no teacher who would tell me even answers :D thx for answer.
by den99
Wed Jan 18, 2012 1:18 pm
Forum: Advanced Algebra ("pre-calculus")
Topic: Precalculus books: why answers only for odds?
Replies: 2
Views: 2143

Precalculus books: why answers only for odds?

Hello, why in all precalculus books are only odd numbers to answers ? where is even numbers ? How should i know if the answer is correct ? Thx.

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