Answer:
See explanation
Step-by-step explanation:
Consider the sequence 
Rewrite it as

The points on the coordinate plane are
(see attached graph).
Since
given sequence is geometric.
Here, our equation is 3/5 (0.6) mile per 1/4 (0.25) hour. 0.25 times 4 = 1, so we have to multiply 1/4 (0.25) 4 times to get 1 mile. To get a proportional answer, we must also multiply 3/5 (0.6) by 4. This comes out to 2.4. So her walking rate is 2.4 miles per hour.
Answer:
I pretty sure I answered this for you like 10-15 minutes ago
You would -a to get 6x=5-a then divide by 6 which you would get your final answer which is x=5-a/6