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Q: expression 49.94x + 27.77y + 25.82z describes the cost of producing each of the handheld vacuum cleaners. Write a polynomial in simplest: Profit = revenue - cost = 56.69X + ??y + 66.74z - (49.94x + 27.77y + 25.82z) = (56.69X - 49.94X) + (??Y - 27.77Y) + (66.74z - 25.82z) = 6.75X + ((??Y - 27.77Y) + 40.92 you did not give us the revenue for the 'y' units.

Q: Is there a vacuum out there it is a certified air purifier? I recently learned that vacuums blow out dust, even ones with expensive hepa filters leak some form of bacteria into the air.I'm looking for facts only, not opinions. Sources preferred.: Any vacuum cleaner you want like that is going to be pricy. And usually when my vacuum cleaners start blowing dust, either a filter needs to be changed, a hose is clogged, or the dust catcher- whatever form it might take- needs to be emptied. I understand that Rainbow Vacuums, while cumbersome, are very good at controlling blowing dust because of the way they work. Try running a web search on hospital-quality vacuums: Those have to be very good at controlling dust because of where they''re used. Good luck!

Q: On a scale of one to one dozen, how do you rate purple vacuum cleaners?: A dozen less one... (I never give a full dozen)...

Q: I have a bag-less dyson vacuum cleaner, and it does a great job vacuuming. Thing is it's getting really dirty. I have asthma, so I really don't want to clean it myself, since there's all manner of dust and what not in it's hoses and other pieces. I empty it's quot;bagwhen I use it and I wash the filters from time to time, but that doesn't keep it from getting really dirty in other places.Are there businesses that clean vacuum cleaners? If so, where can I find them?: Follow the instructions for cleaning your bagless vacuum cleaner, including cleaning and washing the filters. Take the canister out, put it in a garbage bag and shake the dust out, directly into the bag. Wash the canister in warm, soapy water. You shouldn't get any dust in your lungs from doing that. The paper filter needs to be cleaned and washed more often than 'from time to time', and if you do that, your vacuum cleaner shouldn't get really dirty at all. There shouldn't be dust and what not in the vacuum hoses unless you don't clean it on a regular basis. If you have carpets, you need to change them for another type of flooring and that will help keep your vacuum clean.

Q: how much air does a rainbow vacuum move?: You okorder /.. If not, you'll find the web link and phone number for Rainbow in the upper right corner of the page.

Q: What are the best reasonably priced HEPA air filters out there? Is it best to get one that attached to a furnace (but then its only running when the heat or AC is on) or a few smaller ones and move them room to room?Also, I understand that it is imprtant to try and vacuum with a HEPA vacuum. Any advice on something out there that is reasonably priced (and reasonably priced filters).For both, I want to get something that is not too cheap (ie something that actually works) but not top of the line (I am not running a hospital.. just want to increase the quality of the air we breathe at home.: I would go with one attached to your furnace. Most thermostats have a setting that will make the fan run continuously, not just when heat or ac is called for. I think that would be cheaper to buy, run and replace filters for than trying to run several small portable units. We had a Hoover upright with HEPA filter that seemed to work pretty well for a mid-priced vacuum. Bert

Q: there lot many usb vacuum cleaners are available in the market of different rates, but this kind of vacuum cleaner has enough suction power to suck the dust from the air vent(which is near to the fan) of the laptop? Please give suggestion as i m going to buy this if its good then bec. i have problem that my laptop's air vent is block due to dust, so its creating thermal shutdown problem....so please suggest me weather its good to buy or not ? or either please suggest me its alternative to solve my problem?: sorry if it is blocked this won't work. try to blow it out with a hair dryer on high air[not heat] this could unblock your fan vent.

Q: Ever since the EU's ban against high power vacuum cleaners went into effect, global temperatures have maintained a steady plateau. Is there any causal relationship between the ban on vacuums and the global warming plateau?: Its a crazy ban The EU must love dirty houses

Q: Which make of vacuum is better for it's money?: Kirby is outrageously priced and is not worth half the cost. Same with Rainbo and Rainbo has been tested by Consumer Reports and recieved a very low rating. Sara has posted two different Ph. numbers now without the area code.