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BlackZzzverrR [31]
3 years ago
15

A sample is representative of a population A) true B) false

Mathematics
2 answers:
yarga [219]3 years ago
5 0
True hope this helps
kotykmax [81]3 years ago
5 0
It's false I hope I helped u
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Two cars left the city for a suburb, 480 km away, at the same time. The speed of one of the cars was 20 km/hour greater than the
Alex_Xolod [135]

The speed of both the cars are 80km/h and 60km/h

<u>Step-by-step explanation:</u>

Let the speed of one car be 'a' and the speed of other car be 'b'.

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It is given that the speed of one car is 20km/h faster than the other.

 We can write,

       a = b+20

The slower car takes 2 hrs more to reach the suburb than the other car.

Let the time taken by the fastest car be t

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t(t) + 2t - 48 = 0

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