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anonymous
 one year ago
A stamp collector bought 160 stamps for $25.00. The purchase included 5¢ stamps, 15¢ stamps, and 25¢ stamps. The number of 15¢ stamps is three times the number of 5¢ stamps. How many of each type of stamp was purchased?
anonymous
 one year ago
A stamp collector bought 160 stamps for $25.00. The purchase included 5¢ stamps, 15¢ stamps, and 25¢ stamps. The number of 15¢ stamps is three times the number of 5¢ stamps. How many of each type of stamp was purchased?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I found 25 cents and 15 cents, but i cant seem to find 5 cents

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.0how did you solve this for 25c and 15c?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.01604x = 160 (4*30) = 40 for 25 cents 160  3x = 160  (3*30) = 90 for 15 cents

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0how did you get 4x?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0let 5cents stamps to be x and so for 15cents and 25 cents as y ,z respectively

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0now 15 cts stamps are thrice the time of 5 cts => y=3x;

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0now again total no. stamps is 160 hence x + y + z =160 also total amount is 25 $ so 5x+15y+25z=25

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0solve all three equetions for solutions

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0would i plug in 25 for x y and z?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no x for 5 , y for 15 and 25 for z

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0from 1st eq. y=3x puting in 2nd and 3rd we have x+3x+z=160 => 4x + z = 160 ............1 and 5x + 15*3x + 25 z = 2500 ..........2 (since in doller not in cents) => 50x + 25z =2500 or 2x + z = 100 .........2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wouldnt it be .5 .15 .25?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0now from new equation 4x +z =160 and 2x + z =100 2(100z) + z = 160 200 2z +z =160 => z=40 put in 2x +z = 100 => x=(10040 ) / 2 x = 30 and y = 3*30 as 3x y=90 hence solved as 30 stamp for 5 c 40 stamps for 25 c and 90 stamps for 15 c

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes .5 .25 .15 for 25 or 5 25 15 for 2500 both are same

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh okay, thank you :)
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