speed = distance/time
distance = speed * time
d = st
time up the mountain: t
time down the mountain: 6.6 - t
distance each way: d
Up the mountain:
d = st
d = 80t
Down the mountain
d = st
d = 85(6.6 - t)
The distances are equal, so
80t = 85(6.6 - t)
80t = 561 - 85t
165t = 561
t = 3.4
6.6 - t = 6.6 - 3.4 = 3.2
It takes 3.4 hours up the mountain and 3.2 hours down the mountain.
3.4 hours at 85 mph covers the same distance as 3.2 hours at 85 mph.
3.4 hours * 80 mph = 272 miles
3.2 hours * 85 mph = 272 miles
Answer:
1.56
Step-by-step explanation:
7 divided by 9 = .777777777
move the dot over 2 spots to the right = 77.78%
77.78% of 2 = 1.5556
round the nearest hundredth = 1.56
Many statements can be true about those parabolas, so you need to include the list of choices.
This is the list of answer choices that I found for this same question:
<span>A. The second parabola opens downward.
B. The second parabola opens upward.
C. The points of intersection are on the x-axis.
D. The points of intersection are of equal distance from the y-axis.
While A, B or C may be or may not be true, D has to be true.
D. has to be true because the symetry axis of both parabolas is x = 0, so the intersection points will be necesarily to the same distance of the x-axis and the y-axis.
Answer: </span>
<span>The points of intersection are of equal distance from the y-axis.
</span>
