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ohernandez35
25.06.2019 •
Mathematics
This is algebra 1 (solve a system of equation using any method: word problems)
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Ответ:
Hence, it will take 9 seconds for kirk to run 63+9=72 yards and catch upto Max.
Step-by-step explanation:
Let 'y' represents the time Max and Kirk took to meet.
Let the distance between the destination where they will meet from the place where Max is be: x yards
So the distance of destination from initial position of kirk is x+9 yards ( As Max is given a head start of 9 yards)
As speed of Max is 7 yards per sec.And![speed=\dfrac{distance}{time}](/tpl/images/0016/1427/6584e.png)
Hence,
![7y=x\\\\-x+7y=0-------(1)](/tpl/images/0016/1427/bb84c.png)
also speed of kirk is 8 yards per second.By the similar definition of speed we have:
Hence (1) and (2) are the required system of equation.
So on solving the system of equations by elimination method we have:
y=9 and x=63.
Hence, it will take 9 seconds for kirk to run 63+9=72 yards and catch upto Max.
Ответ:
C
Step-by-step explanation: