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Alenkinab [10]
2 years ago
13

Sarah drives her car 133 miles in 285 minutes. What is her average speed in miles per hour?

Mathematics
1 answer:
borishaifa [10]2 years ago
4 0

Answer:

28 miles per hour

Step-by-step explanation:

133 miles/285 minutes = 133 miles/4.75 hours = 28 miles/hour

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3 years ago
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3 years ago
The 9th and the 12th term of an arithmetic progression are 50 and 65 respectively. find the common difference
Rzqust [24]

The first term of the arithmetic progression exists at 10 and the common difference is 2.

<h3>How to estimate the common difference of an arithmetic progression?</h3>

let the nth term be named x, and the value of the term y, then there exists a function y = ax + b this formula exists also utilized for straight lines.

We just require a and b. we already got two data points. we can just plug the known x/y pairs into the formula

The 9th and the 12th term of an arithmetic progression exist at 50 and 65 respectively.

9th term = 50

a + 8d = 50 ...............(1)

12th term = 65

a + 11d = 65 ...............(2)

subtract them, (2) - (1), we get

3d = 15

d = 5

If a + 8d = 50 then substitute the value of d = 5, we get

a + 8 * 5 = 50

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a = 50 - 40

a = 10.

Therefore, the first term is 10 and the common difference is 2.

To learn more about common differences refer to:

brainly.com/question/1486233

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4 0
2 years ago
Please help i don’t understand this
avanturin [10]

Answer:

Step-by-step explanation:

The solution is in the attached file

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What is the definition of mathematics?
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<span>the abstract science of number, quantity, and space.

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