Its choice d because 1^2 - 5(1) + 6
= 1 - 5 + 6
= 2
Answer:
y-intercept: (0,12)
Step-by-step explanation:
- first trip: the distance is
S=90 m
while the speed is
v=56 m/h
Therefore the time taken is

- second trip: the distance covered is still the same,
S=90 m
while the average speed this time was
v=49 m/h
Therefore, the time taken for the second trip was

- The average speed for the whole trip is the total distance divided by the total time taken: