let P = price paid for the phone
1.3P = 390
P = 300
let S = selling price
S = 0.8P = 0.8(300) = 240
Let the original price = $100, 30% high means marked price = $130
When marked price = $130 original price = $100
When marked price = $1 original price = $100/130
When marked price = $390 original price = $(100/130) x 390 = $300
Now he has to sell it for 20% less. 20% of 300 = 20 x 300 x 1/100 = $60
So he will get $240 for cellphone
1) Bret drove for 4 hours on the freeway the decreased his speed by 20 miles per hour and drove for 5 more hours on a country road. If his total trip was 485 miles, then what was his speed on the freeway?
2) Payrolls for the three highest paid baseball teams (Yankees, Mets Braves) for 2003 totaled $376 million (USA TODAY: Latest World and US News - USATODAY.com). If the team payroll for the Yankees was $36 million greater than the payroll for the Mets and the payroll for the Mets was $11 million greater than the payroll for the Braves, then what was the 2003 payroll for each team?
6) If 60% of the registered voters of Lancaster County voted in the November election and 33,420 votes were cast, then how many registered voter are there in Lancaster County?
7) If 28 new AIDS cases were reported in Landon County this year and 35 new cases were reported last year, then what percent decrease in new cases is this?
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