Y=2.5x+b
Skeleton equation: y=mx+b
Since it is a four combination lock or permutation and she wants the last digit to be seven we have_,_,_,7
The first digit: Since we need it to be any number except 7 we have 9 possibilities.For the second digit: We have 8 possibilities since the numbers can't be repeated and we already chose 7 to be the last digit and any other digit to be the first digit.For the third digit: there are 7 possibilities since we already chose three numbers and these cannot be repeated.
We have the following:9*8*7=504
Alright The Right Ans Is 30/60-42/60=12/60
Gary wrote the answer correctly. 9.095 is the number between 9.054 and 9.183
