document.write( "Question 1024290: I need 45 cents worth of stamps to send a letter to my pen pal. I looked at the stamps my mother has, and they are all 15-cent, 10-cent, and 5-cent stamps. How many different combinations of stamps can I put on my letter? \n" ); document.write( "
Algebra.Com's Answer #639753 by Edwin McCravy(20055)\"\" \"About 
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document.write( "If you don't use any 15c stamps, you can put from\r\n" );
document.write( "0 through 4 10c stamps and the rest in 5c stamps.\r\n" );
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document.write( "That's 5 ways.\r\n" );
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document.write( "If you use exactly 1 15c stamp, you have 20c left,\r\n" );
document.write( "which you can get by putting put from 0 through 3 \r\n" );
document.write( "10c stamps and the rest, if any, in 5c stamps.\r\n" );
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document.write( "That's 4 ways.\r\n" );
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document.write( "If you use exactly 2 15c stamp, you have 15c left,\r\n" );
document.write( "which you can get by putting put from 0 - 1 10c \r\n" );
document.write( "stamps and the rest in 5c stamps.\r\n" );
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document.write( "That's 2 ways\r\n" );
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document.write( "Or you can use 3 15c stamps.\r\n" );
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document.write( "That's 1 more way.\r\n" );
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document.write( "Total:  5 + 4 + 2 + 1 = 12 ways.\r\n" );
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document.write( "Edwin
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