85- (3.5*12)
* means times
I think this is correct.
Answer:

Step-by-step explanation:
To know the hours of flight, subtract the departure time from the arrival time
so

Remember that Chicago and Dallas are in the same time zone
1. angles 7 and 3, angles 2 and 6
2. angle 1
3. they’re alternate exterior angles
4. they’re consecutive interior angles
5. angle 2
6. angle 4
Replace all values of x as 4
f(4)=1/2(4)+5
f(4)=4/2+5
f(4)=2+5
f(4)=7
Hope I helped :)