For this scenario, we can define:

Where,
d represents distance
v signifies speed
t indicates time
Rearranging to find time gives us:

The total driving duration is half an hour:

Rearranging for d results in:
Conclusion:
she lives 18 miles from the store
Answer:
zero slope
Step-by-step explanation:
Hope this information is helpful:)
Response:
b + d = 180°, a = d, and a = c
Detailed explanation:
In the diagram, we observe that the only condition for the lines to be parallel is that the angles correspond with their counterparts, for instance, a must equal d. The equation a = c indicates that all angles must be equal for lines m and n to remain parallel. Finally, the equation b + d = 180° confirms that this holds true only if lines m and n are parallel.