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Varvara68 [4.7K]
3 years ago
8

A student scores 50 and 100 on two tests in class. What is his average?

Mathematics
2 answers:
9966 [12]3 years ago
6 0

75% you add them together then devide by 2

lapo4ka [179]3 years ago
3 0

75% you add them together then divide by them by 2 and also did you mean 50 on one test and 100 on another?

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On his outward journey, Ali travelled at a speed of s km/h for 2.5 hours. On his return journey, he increased his speed by 4 km/
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Answer:

3.08 km/h.

Step-by-step explanation:

We know that,

Speed=\dfrac{Distance}{Time}

Ali traveled at a speed of s km/h for 2.5 hours.

Let d be the distance and t be the time.

2.5=\dfrac{d}{t}

2.5t=d      ...(1)

On his return journey, he increased his speed by 4 km/h and saved 15 minutes. So, distance is d and times is t-15.

4=\dfrac{d}{t-15}

4(t-15)=d      ...(2)

From (1) and (2), we get

4(t-15)=2.5t

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So, the average speed is

\text{Average speed}=\dfrac{\text{Total distance}}{\text{Total time}}

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Therefore, the average speed is 3.08 km/h.

3 0
3 years ago
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