Answer:
7.5 hours
Step-by-step explanation:
Time is inversely proportional to speed for the same distance. The bus speed is 40/50 = 4/5 of the car speed, so it will take 5/4 as long.
(5/4)·(6 h) = 7.5 h
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If you like, you can use the relations ...
distance = speed × time
time = distance/speed
to compute the distance between A and B, then the time at the lower speed:
distance = (6 h) × (50 mi/h) = 300 mi
time = (300 mi)/(40 mi/h) = 30/4 h = 7.5 h
-2(2f-4) = -4(-f+2)
Distribute the -2, multiplying it to each term inside the parentheses.
(-2 × 2f = -4f, and -2 × -4 = 8 because the double negatives cancel)
-4f+8 = -4(-f+2)
Now distribute the -4...
(-4 × -f = 4f, and -4 × 2 = -8)
-4f+8 = 4f-8
Add 4f to each side so that our variable is on just one side of the equation.
8 = 8f-8
To get rid of that -8 and isolate our variable, add 8 to each side.
16 = 8f
Divide each side by 8 to get the value of f.
2 = f
Answer:
O
Step-by-step explanation: Just divide each kilometer by hrs for each one (sry if this doesn't make sense) O: 60 divided by 5= 12 M: 80 divided by 5=16 N: 110 divided by 5= 22. Therefore O= 12 kilometers per hour, which means its the slowest ( I did this question in khan and got it right)
Answer:
4
Step-by-step explanation: