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KG777
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Ok so this is so confusing The volume of water in a rectangular swimming pool can be modeled by the polynomial 2x3 − 9x2 + 7x + 6. If the depth of the pool is given by the polynomial 2x + 1, what polynomials express the length and width of the pool? Why couldn't they just give me the volume?
 2 years ago
 2 years ago
KG777 Group Title
Ok so this is so confusing The volume of water in a rectangular swimming pool can be modeled by the polynomial 2x3 − 9x2 + 7x + 6. If the depth of the pool is given by the polynomial 2x + 1, what polynomials express the length and width of the pool? Why couldn't they just give me the volume?
 2 years ago
 2 years ago

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geoffb Group TitleBest ResponseYou've already chosen the best response.0
Can you factor the polynomial? I bet one of the factors will be 2x+1. What are the other two?
 2 years ago

petewe Group TitleBest ResponseYou've already chosen the best response.2
they did give you the volume
 2 years ago

KG777 Group TitleBest ResponseYou've already chosen the best response.0
If I was to graph it into a calculator would it show the numbers as roots touching the x axis at 0?
 2 years ago

petewe Group TitleBest ResponseYou've already chosen the best response.2
divide 2x3 − 9x2 + 7x + 6 by 2x + 1 and you'll be given a quadratic. factor it to find the other 2 dimensions
 2 years ago

KG777 Group TitleBest ResponseYou've already chosen the best response.0
bingo x3, x2
 2 years ago

petewe Group TitleBest ResponseYou've already chosen the best response.2
you're allowed to use graphing calculators on tests?
 2 years ago

KG777 Group TitleBest ResponseYou've already chosen the best response.0
thanks you guys
 2 years ago

petewe Group TitleBest ResponseYou've already chosen the best response.2
not sure if srs
 2 years ago

geoffb Group TitleBest ResponseYou've already chosen the best response.0
Why bother learning how to do it when there's OpenStudy and the TI83, hey @petewe?
 2 years ago

petewe Group TitleBest ResponseYou've already chosen the best response.2
are you american?
 2 years ago

petewe Group TitleBest ResponseYou've already chosen the best response.2
it just amazes me how lenient the american education system is sometimes
 2 years ago

geoffb Group TitleBest ResponseYou've already chosen the best response.0
I'm in Canada, and it doesn't seem to be much better here. I took grade 12 math and calculus years ago now, but even then there were graphing calculators. I'm pretty sure they were allowed to be used on the finals. I was the only kid in the class without one (couldn't afford it), but I did the best in my class on the final. Knowing the fundamentals of how to do things is so important, and you're right—it seems it is being lost.
 2 years ago
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