What is the product of (x − 7)(2x² – 5x - 3 + 3)?
1 answer:
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Answer:
Average speed in mph with which he goes to parent's place = 75 mph
Average speed with he comes back = 50 mph
Explanation:
Distance between Jamie's house and parent's house = 510 miles.
Let u be the average speed in mph with which he goes to their place.
We have the average speed of coming back = (u -25) mph
Total time of journey considering both ways = 17 hours.
Time taken to go their home = 510/u hours
Time taken for coming back = 510/(u-25) hours
So total time =
Equating both times we have
u = 75 mph or u =10 mph
If the average speed in mph with which he goes to their place = 75 mph, average speed with he comes back = 75-25 = 50 mph
If the average speed in mph with which he goes to their place = 75 mph, average speed with he comes back = 10-25 = -15 mph(Not possible)
So, Average speed in mph with which he goes to parent's place = 75 mph
Average speed with he comes back = 50 mph