Distance from New Orleans to Boston and back is the same.
t - time from New Orleans to Boston
(t-1) - time from Boston to New Orleans
40t - distance between New Orleans and Boston.
80(t-1) - distance between Boston and New Orleans.
40t = 80(t-1)
40t = 80t - 80
40t = 80
t=2 h
To find average speed we need to find all distance and divide it at all time.
All distance = 40t +80(t-1) = 120t - 80
All time = t+(t-1)= 2t-1
Average speed =(120t - 80)/(2t-1)
Now we can substitute t=2.
Average speed =(120*2 - 80)/(2*2-1)=53.33 m/s
You could write it as a fraction (3/4) or you could say "3 to 4".
Answer:
7 feet 10 inches
Step-by-step explanation:
A ball is falling from a height of 30 feet and then it bounces. After each bounce, the maximum height of the ball is 80% of the previous height.
So, after 1st bounce, the maximum height was (0.8 × 30) feet.
Similarly, after 2nd bounce, the maximum height was 0.8(0.8 × 30) feet.
In this way, the maximum height of the ball after nth bounce will be
So, after 6th bounce the maximum height will be feet = 7 feet 10 inches (Appx.)
Answer: OPTION B
Step-by-step explanation:
Let's call:
c: the number of cars.
m: the number of motorcycles.
Based on the given information, you can set up the following system of equations:
You can solve it by the Elimination method:
- Multiply the first equation by -4.
- Add both equations to cancel out the variable "c".
- Solve for "m":
(24 motorcycles)
- Substitute m=24 into any of the original equations ans solve for "c". Then:
(14 cars)
Answer:
50%
Step-by-step explanation:
half of the numbers on dice are even