So this is not too hard, as with any math problem we write what we know.
Starting speed: 80km/h
Time from P to Q: 2.5h
Increase in speed: 20km/h (25% is dividing by 4)
Distance from Q to R: 150 kilometers
So let's find the speed and distance for both legs of the trip.
Speed for P to Q: 80km/h
Distance from PtoQ: 200km (2.5h * 80km/h)
Speed from Q to R: 100km/h (80 +20)
Distance from QtoR: 150km.
Now we multiply the speeds by their respective distances add them and then divide by the total distance.
((80 *200) + (100 * 150))/350 = ~88.57143
Answer:
Step-by-step explanation:
In first step, we just open the brackets and you should know that ++ = + and +- = - and -- = + and -+ is also equal to -
after opening the brackets we combine terms which are a like
then any order, any grouping you can write the answer in any order and you can also take - common and it will be written as
-(5p-7a+6)
if you multiply the minus it will be the same.
Answer:
4.5 hours
Step-by-step explanation:
If you take both of their alone time
6 and 3
Add them together
Divide both of them By 2
Giving you your answer
you would do 7.8 times 0.5 and would get 3.9. You would add 7.8 and 3.9 and get 11.7 That is your answer
List the time tables of 3 and 7