Answer:
Average speed
= 5 5/6 mph , or
= 5.83 mph (to 2 decimals)
Step-by-step explanation:
Average speed is total distance divided by the total time it takes to cover the given distance.
Since uphill = 5 mph, and downhill = 7 mph, we know the average speed is between 5 and 7 mph.
Let
x = distance uphill, and also distance downhill.
Total distance = 2x miles
Total time = x/5 + x/7 hours = 12x/35 hours
Average speed
= total distance/total time
= 2x / (12x/35) mph
= 70x / 12x
= 5 5/6 mph
= 5.83 mph (to 2 decimals)
Answer:
Parallel
Step-by-step explanation:
The run right by each other not touching
Answer:
Perimeter of the board
Step-by-step explanation:
That measurement of "the border of her bulletin board" is actually the perimeter of the board.
Answer:
So there is 8 old books
Step-by-step explanation:
Exact form - -4/3
decimal form - -1.3 repeating
mixed number - -1 1/3
