document.write( "Question 1157918: you dump out your piggy bank and find that you have only nickels and dimes. there are a total of 50 coins and the coins add up to 3.90 how many nickles do you have ? \n" ); document.write( "
Algebra.Com's Answer #780837 by greenestamps(13203)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "We are to determine the number of nickels. \n" ); document.write( "So start by seeing what the total value would be if all 50 coins were dimes: 50*10 = 500 cents or $5.00. \n" ); document.write( "That is $1.10 too much, or 110 cents too much. \n" ); document.write( "So imagine replacing dimes with nickels until you get the correct total of $3.90. \n" ); document.write( "Each time you exchange a dime for a nickel, the total value decreases by 5 cents. \n" ); document.write( "The number of times you need to do that to reduce the total by 110 cents is 110/5 = 22. \n" ); document.write( "You replaced 22 of the dimes with nickels to get the correct total of $3.90. \n" ); document.write( "ANSWER: 22 nickels. \n" ); document.write( " \n" ); document.write( " |