It should be 571/1000 as a fraction
60mph-10mph=T would be the answer... I believe.
The answers are expressions:
(7b*3)+(7b*c)
21b+7bc
I hope I helped!
I believe the answer is B.) 120 because 170 is much wider than the CFE so it needs to be lower than that but not to much lower which is where 120 would come in.