Answer:
80 km/h
Step-by-step explanation:
Let p represent the planned speed in km/h. Using the relation ...
... distance = speed × time
we can take advantage of the fact that the planned trip distance did not change.
... p × 2.5 = (p+20) × (2.5 -0.5)
... 2.5p = 2p +40 . . . . simpify
... 0.5p = 40 . . . . . . . . subtract 2p
... p = 80 . . . . . . . . . . . divide by 0.5
The planned speed was 80 km/h.
Answer:
{52,72,86,105}
Step-by-step explanation:
hope this helps :)
Answer:
$4.84
Step-by-step explanation:
2x2=4
3x3x3x3=81
81x5=1,620
1,620 is your answer