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Vikentia [17]
2 years ago
10

How long did it take a biker to travel 20 miles at 12mph

Mathematics
1 answer:
Anika [276]2 years ago
5 0

Time = Distance / speed

Time = 20 miles / 12mph

Time = 1 and 2/3 hours ( 1 hour and 40 minutes)

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Answer:

z = 21 ; y= 16

Step-by-step explanation:

first of all we have to isolate a variable.

In second expression we can obtain:

3y = 2z+6

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now we have to substitute this value in the first equation and solve it

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now we have to substitute z in the second equation:

y = 2/3 (21) +2

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