Answer:
Yes.
Step-by-step explanation:
It is given that, A sponge can filter 8 liters of water in 10 hours or 12 liters in 15 hours.
8 L = 10 h
1 h =
= 1.25 h
or
12 L = 15 h
1 h =
= 1.25 h
Hence, this relationship is proportional.
Answer: this is just algebra, so you just got to add 3 plus 12 and then add the X at the end cause you don't know it's value.
Step-by-step explanation:
In this case you are multiplying 3 times X so it would stay as 3 and just add 12 = 15 X
Hope I helped.
Using the student id given above, a = 19 and b = 7
Average speed for the first 54 km = 48+a km/h
Plug a = 19
Average speed for the first 54 km = 48+19 = 67 km/h
Average speed for remaining 86 km = 43-b km/h where b = 7
Average speed = 36 km/h
Average speed of entire journey = total distance / total time taken
![speed = \frac{distance}{time} and time = \frac{distance}{speed}](https://tex.z-dn.net/?f=speed%20%3D%20%5Cfrac%7Bdistance%7D%7Btime%7D%20%20and%20%20time%20%3D%20%5Cfrac%7Bdistance%7D%7Bspeed%7D)
Time taken to cover 54 km =
hr
Time take to cover 86 km =
hr
Total time taken = 3.2 hours.
Total distance = 86+54= 140 km
Average speed of the entire trip =
= 43.75 km/ h