Answer:
The answer is A
Step-by-step explanation:
Answer:
The best layout for your data within a spreadsheet is as a single big rectangle with rows corresponding to subjects and columns corresponding to variables. The first row should contain variable names, and please do not use more than one row for the variable names.
Step-by-step explanation:
The airplane went 5195.33 km
Step-by-step explanation:
Distance = speed × time
The given is:
1. An airplane flies for 3.5 hours with a constant speed of 840 km/h
2. Then for another 3 hours 19 minutes with a constant speed of
680 km/h
We need the distance it traveled
For the first part
∵ The time is 3.5 hours
∵ The speed is 840 km/h
∵ Distance = speed × time
- Substitute the values of the speed and the time in the rule
∴ Distance = 840 × 3.5
∴ Distance = 2940 km
For the second part
∵ The time is 3 hours and 19 minutes
- We must change the minutes to hour
∵ 1 hour = 60 minutes
∴ 19 minutes =
hour
∴ The time is
hour
∵ The speed is 680 km/h
∴ Distance = 680 × ![3\frac{19}{60}](https://tex.z-dn.net/?f=3%5Cfrac%7B19%7D%7B60%7D)
∴ Distance =
km
∴ The total distance = 2940 + ![2255\frac{1}{3}](https://tex.z-dn.net/?f=2255%5Cfrac%7B1%7D%7B3%7D)
∴ The total distance =
km
It went 5195.33 km
Learn more:
You can learn more about constant speed in brainly.com/question/568302
#LearnwithBrainly
Answer:about 19
Step-by-step explanation:
The number isn’t whole but its close to that
1a) Time = Distance/Speed
t= 20/x seconds
b) d=25m
s= x+0.5 m/s
t= d/s = 25/x+0.5
c) total time = 6 seconds
therefore, 20/x + 25/x+0.5 = 6
make a common denominator of x(x+0.5):
(20(x+0.5) + 25x)/x(x+0.5) = 6
move the demoninator to the other side, and expand to form:
20x+10+25x = 6x(x+0.5)
45x+10= 6x^2 +3x
tidying it up (moving everything to one side)
6x^2 - 42x-10 = 0
divide everything by 2
3x^2-21x-5= 0 (as required)
d) use quadratic formula to solve
e) therefore, what does x equal?
hope this helps