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If 9 books cost 20 dollars and 25 cents how much does one book cost?
9 books cost $20.25 9/9 = 1 book costs $20.25/9 = $2.25
If you buy 3 books for five dollars how much would twelve books cost?
3*4 is 12 so $5 * 4 is $20. It's like a proportion. So, 12 books would cost $20.
You bought 3 books at 1.25 each How much did they cost?
$3.75- $1.25 +$ 1.25 +$1.25 ------------------------- $3.74 three dollars seventy-five
Oranges cost 3 dollars a dozen how much would 3 oranges cost?
4 dollars
If the yearbook staff sells 50 yearbooks the cost per yearbook 45 if they sell 125 yearbooks the cost per yearbook is 37.50 find the proce per yearbook if the staff sells 150 yearbooks?
You sell 50 books, the cost of the yearbook is $45 You sell 125 books, the cost of the yearbook is $37.50 How much is the cost per yearbook if you sell 150 books? Usually when you're in the process of determining the cost of books per how many books sold you talk to the publishing company who determine the price of the per units of book. From the information given it would seem that per every 75 books they decrease the the price by $7.50, that means that per every 25 they would decrease the price by $2.50 per book. So at 150 books the price of the book would be $35 per book.
