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algebra
An executive bought 300 stamps for $73.80. The purchase included 15 cent stamps, 20 cent stamps, and 40 cent stamps. The number of 20 cent stamps is four times the number of 15 cent stamps. How many 40 cent stamps were purchased?
asked by Anonymous on January 17, 2012 
Math(Algebra)
Joe, using only .32 cent stamps and .20 cent stamps, put $3.36 postage on a package he sent to his sister, he used twice as many .32cent stamps as 20cent stamps. How many of each stamp did he use.....please help me .this is
asked by Bailee on April 12, 2008 
math
suppose you bought some 32 cent stamps and some 20 cent stamps. you spent $3.92 for 16 stamps. how many of each stamp did you buy? x = number of 32 cent stamps y = number of 20 cent stamps ================== x+y = 16 0.32x + 0.20y
asked by betty on February 2, 2007 
Math (Please Help)
A man went to a post office to buy stamps. He bought x, 50 cent stamps and y, 25 cent stamps for $3.50. If he bought twice as many 50 cent stamps and half as many 25 cent stamps, the cost would be $4.75. Evaluate x and y
asked by Charmin on October 21, 2011 
algebra 1
plz explain how to do this in detail: using only 39 cent and 24 cent stamps, charlie put $7.14 postage on a package he mailed to his sister. if he used twice as many 39 cent stamps as 42 cent stampsp, how many 24 cent stamps did
asked by Robbie on March 29, 2011 
Math
On a Christmas package, Audrey needs to use only 40cent stamps and 16cent stamps. If she uses twice as many 40cent stamps as 16cent stamps, how many of each type of stamp must she use to mail a package costing $5.76 in
asked by Michael on February 10, 2015 
Math
On a Christmas package, Audrey needs to use only 40cent stamps and 16cent stamps. If she uses twice as many 40cent stamps as 16cent stamps, how many of each type of stamp must she use to mail a package costing $5.76 in
asked by Erik on January 18, 2013 
Math
On a Christmas package, Audrey needs to use only 40cent stamps and 16cent stamps. If she uses twice as many 40cent stamps as 16cent stamps, how many of each type of stamp must she use to mail a package costing $5.76 in
asked by Cat on January 18, 2013 
Math
On a Christmas package, Audrey needs to use only 40cent stamps and 16cent stamps. If she uses twice as many 40cent stamps as 16cent stamps, how many of each type of stamp must she use to mail a package costing $5.76 in
asked by Frank on January 18, 2013 
math
A stamp collection consists of 3, 8, and 15 cent stamps. The number of 8 cent stamps is one less than triple the number of 3 cent stamps. The number of 15 cent stamps is six less than the number of 8 cent stamps. The total value
asked by tiff on September 7, 2008