Answer:
75.4
Step-by-step explanation:
C=2πr=2·π·12≈75.39822
Average speed
Average speed between the checkpoints
distance between the checkpoints
divided by
time between the checkpoints.
Distance between the checkpoints =
(mileage at B) minus (mileage at A)
=(208)-(120) = 88 miles .
Time between the checkpoints =
time at - time at A
=(3:00 PM) - (1:00 PM) = 2 hours .
Average speed between the checkpoints =
(88 miles) / (2 hours)
=44 miles per hour .
Answer:
y = (4/7)X + 22/7
Step-by-step explanation:
Moving from (-2, 2) to (-6, -5), we see that x (the "run") decreases by 4 and y (the "rise") decreases by 7 (from 2 to -5). Thus, the slope is m = rise / run =
-4/(- 7) = 4/7. The slope intercept form y = mx + b takes on the specific values 4/7 for m, 2 for y and -2 for x:
2 = 4/7(-2) + b, or 14 = -8 + 7b. Thus, 22 = 7b, and b = 22/7.
The desired equation is y = (4/7)X + 22/7.
Answer:
2/3
Step-by-step explanation:
