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3 years ago

Many drove 45 miles in 0.75 hours. What was the average rate he drove in miles per hour

Mathematics

2 answers:

Digiron [165]3 years ago

8 0

Answer:

Average rate is 60 miles per hour

Step-by-step explanation:

Speed is a average rate at which someone or something covering the distance in a unit time. Speed is the average rate of movement.

As per given data

Distance = 45 miles

Time Taken = 0.75 hours

As we know , the formula of speed is

Speed = Distance / Time

Speed = 45 miles / 0.75 hours

Speed = 60 miles per hour

Cerrena [4.2K]3 years ago

5 0

Speed= distance / time = 45 / 0.75 = 60 miles per hour

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kupik [55]

The fractions which cannbe formed are: 2/3, 3/2, 2/5, 5/2, 3/5 and 5/3.
Now, we find the products with the third number:
2/3*5= 10/3 = 3.33 > 2
3/2*5 = 15 >2= 7.5 > 2
2/5*3= 6/5 (rejected)
5/2*3 = 15/2 > 2
3/5*2= 6/5 (rejected)
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yawa3891 [41]

Answer:

The third comment is the true one: "If I know the measures of angles C and B, I can find the measures of A and D."

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I hope this helps!

Step-by-step explanation:

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2 years ago

Angles A and B are supplementary. Angle A has a measure of 80 degrees. What is the measure of angle B?

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3 years ago

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"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students

dezoksy [38]

Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

Step-by-step explanation:

Since we have given that

Sample size = 400

Mean = $357.75

Standard deviation = $37.89

At 95% confidence level, z = 1.96

We first find the margin of error.

Margin of error is given by

$z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{37.89}{\sqrt{400}}\\\\=3.71$

95% confidence interval would be

$\bar{x}\pm \text{margin of error}\\\\=357.75\pm 3.71\\\\=(357.75-3.71,357.75+3.71)\\\\=(354.04,361.46)$

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

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3 years ago