The speed of the airplane = 2951 / 6.5 = 454 mph
Y=6. you would replace x with 7 in the equation.
6(7) = 7y
42=7y
6=y
5B + B = 20
6B = 20
B = 20 / 6
= 10/ 3 hrs
A = 5 ( 10/3 + 2)
= 5 (16/3)
= 80 / 3 hrs
Brian traveled 10/3 hours and Annie traveled 80/3 hours.
You don’t need to go to 2 m because all values are between 0 and 1. So I’d probably say b, from 0 to 1 with intervals of .1.