five cities where water is wasted and why , reasons
Answers
Answer:
Given equation:
8x2+8xy+2y2+26x+13y+15=0
can be written as 2(2x+y)2+13(2x+y)+15=0
or 2t2+13t+15=0 (where t=2x+y)
⇒(t+5)(2t+3)=0
⇒t+5=0 and 2t+3=0
⇒2x+y+5=0 and 2(2x+y)+3=0
⇒2x+y+5=0 and 2x+y+23=0
⇒2x+y+c1=0 and 2x+y+c2=0
⇒c1=5 then c1=23
if c1=23 then c1
Explanation:
Doing the Dishes: By Hand or Dishwasher?
A lot depends on your dishwashing style: A typical session that includes turning the water on and off will go through about 20 gallons (75 liters) or so. But if you leave the water running while scraping at those last grisly bits on your fine china, you may use more than twice that amount. Modern electric dishwashers, in contrast, need less than 10 gallons (38 liters) per average load, says a survey by the American Water Works Association.
2. Washing the Car (and the Driveway)
Wear that bathing suit at the pool or the beach, but not for posing in the driveway while sluicing the suds off your auto with hose water. According to Kaady Car Washes, a west coast chain, a home car wash can go through 80 to 140 gallons (300 to 530 liters) of water, whereas a wash at one of its garages will take about 30 to 45 gallons (115 to 170 liters). Professional car washes also utilize methods that recycle water: The U.S. Environmental Protection Agency mandates that wastewater be channeled to treatment plants to avoid polluting the environment; contaminated water from your home car cleansing just flows into street drains or leaches into the soil.
3. Slipping Through the (Pool) Cracks
Cannonballs aside, a swimming pool naturally loses about 1,000 gallons (3,785 liters) a month to evaporation, according to the Maui County, Hawaii, Department of Water Supply, although the local climate and the pool's overall surface area determines the amount that's actually lost. A bigger problem arises from the leaks that pools often develop during their lifetimes from cracks in their foundations, liner tears and pipe damage. Estimates vary wildly, depending on everything from a region's temperature fluctuations to seismic activity. National Leak Detection (pdf), a company based in Mesa, Ariz., puts the figure at a whopping 30 percent. Three hundred miles (480 kilometers) west in Palm Springs, Calif., American Leak Detection, Inc., puts the pool leak rate at a more conservative one in 20. Either way, because most pools have automatic refillers, owners often fail to notice the loss until their next water bill arrives.
4. Lawn Sprinklers: Fountains of Backyard Verdure or Pernicious Aquifer Guzzlers?
The water sprinklers that keep the turf lush and the flowers blooming can consume 265 gallons (1,000 liters) an hour, says Waterwise, a U.K. water-conservation group. This amount rivals or exceeds estimates of what an average U.S. household uses daily. A good tip: deploy the sprinkler either in the early morning hours or at dusk; less water will evaporate in the cooler temperatures and more will actually get to the plant roots. But be mindful about leaving it on; besides potentially drowning your petunias, you may also be breaking the law. A new drought-busting measure in the City of Los Angeles will permit automated sprinklers to run only 15 minutes a day this summer.
5. Well-Watered Desert Resorts
The term "desert resort" is synonymous with the City of Las Vegas. The Venetian canals of the Bellagio, as well as the Mirage's water-and-fire volcano, make conspicuous water consumption in Sin City iconic. Appearances can be deceiving, though. In fact, the Las Vegas Strip accounts for just three percent of local water use, according to the Southern Nevada Water Authority. Fully 70 percent of the city's water supply goes toward irrigating the 60-plus golf courses and the many residential lawns in the area.