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bagirrra123 [75]
3 years ago
7

This distance-time graph represents a journey made by Jo.

Mathematics
1 answer:
ioda3 years ago
6 0

Answer:

Jo started decelerating at the 10th minute

His average speed for the last 30 minutes of the journey is 4/30 km/minute

Step-by-step explanation:

To get what Jo did at 10 minute, we look at the graph.

At the 10th minute, we can see that we have a sharp turn from the top to the zero position at the 20th minute

so we can say that Jo started deceleration at the 10th minute

For the last 30 minutes of the journey, he travelled a distance of 4km

So, mathematically, his average speed will be;

Distance/ time = 4km/30 minutes = 4/30 km/minute

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Answer:

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Using Cramer's Rule, you can also find the x-value. The math is not so different.

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