A bank teller had 125 Bills in $10 and $20 bills to start the day. If the total in her register was $1650, how many of each bill did the teller start off with ?

40 twenties and 85 tens

Step-by-step explanation:

10x+20y=1650

10x+10y=1250

10y=400

y=40

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

60: 45 =12: 9 =4: 3 so the answer is 4: 3