Homework Help: math

Posted by kelly on Tuesday, September 8, 2009 at 9:43pm.

daniel has twice as much money in one-dollar bills as he does in five-dollar bills. he has 33 bills in all (all one-dollar and five-dollar bills). how much money does he have?

math - MathMate, Tuesday, September 8, 2009 at 10:02pm
Let
F=number of five dollar bills,
then
number of one-dollar bills = (5*F)*2
Total number of bills
33 = (5*F)*2 + F
Can you complete the solution?
math - kelly, Tuesday, September 8, 2009 at 10:47pm
no i still need your help, please
math - MathMate, Tuesday, September 8, 2009 at 10:53pm
Let F=number of 5 dollar bills.

"daniel has twice as much money in one-dollar bills as he does in five-dollar bills."
means that if he had 1 5-dollar bill, he has 10 dollars worth of $1-bills. That makes 11 bills.

If he had 2 $5-bills, he would have $20 worth of 1 dollar bills. That makes 22 bills.

Can you continue?
math - kelly, Tuesday, September 8, 2009 at 11:16pm
no i am still a little confused
math - MathMate, Tuesday, September 8, 2009 at 11:48pm
Let F=number of 5 dollar bills.

"daniel has twice as much money in one-dollar bills as he does in five-dollar bills."
means that if he had 1 5-dollar bill (worth $5), he has twice that amount in $1-bills, i.e. 10 dollars worth of $1-bills. That makes a total of 11 bills, 1 five, and 10 ones.

If he had 2 $5-bills (2*5=$10), he would have $20 worth of 1 dollar bills. That makes 22 bills (2 fives, and 20 ones).

If he had 3 $5-bills (3*5=$15), he would have $30 worth of 1 dollar bills. That makes ______ bills? (3 fives and 30 ones).
math - KELLY, Wednesday, September 9, 2009 at 12:00am
WOW! I GET IT NOW. THANKS ALOT. U R REALLY GOOD!
math :) - MathMate, Wednesday, September 9, 2009 at 7:43am
You're welcome!

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