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Earn +20 ptsQ: How many stamps for 10 x 12 5 ounce evelope?
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How many stamps do you need for an envelope from Texas to Israel?
The postage from the US for an ordinary first class letter of 1 ounce or less is 98 cents You can buy a 98-cent stamps or use any combination of stamps whose total value is 98 cents of more. 2 forever stamps plus a 10-cent stamp would work.
Mrs Chin bought some 0.20 stamps and an equal number of 0.32 stamps She paid a total of 5.20 for all the stamps How many of each type of stamp did Mrs Chin buy?
.2X + .32X = 5.2 Combined like terms .52X = 5.2 divide by .52 X = 10 10 stampes of each type
How many stamps are needed to mail a 7 by 10 envelope with 1 paper?
my mom who is a postal worker says 2
How many different ways can you arrange 100 stamps in rows with the same number in each row with more than 2 rows but fewer than 10 rows?
Two ways only. 4 rows with 25 stamps each or 5 rows with 20 stamps each.
How many ounces of 20 percent saline solution must be added to 40 ounces of a 5 percent saline solution to make a 10 percent saline solution?
NOT: 15 ounces to make 10%Correct answer:Twenty ouncesCalculus:Let it be M ounces. Then:20%*(M ounce) + 5%*(40 ounce) = 10%*(M+40 ounce)20*M + 200 = 10*M + 400(20-10)*M = 400-20010M = 200M = 20
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