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Artyom0805 [142]
3 years ago
10

A professor is grading the final exam. He notices that the mean test score is 61, and the standard deviation is 10. The test sco

res were normally distributed. if there were 450 students in the data sample, how many would have a test score between 61 and 71? *Round your answer to the nearest full value.
Mathematics
1 answer:
charle [14.2K]3 years ago
3 0

Answer:

66666699999

Step-by-step explanation:

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If 5x – 4 = 31, what is the value of x?​
Lunna [17]

Answer:

x = 5 \frac{2}{5}

Step-by-step explanation:

Hi there!

So, to answer this problem, I'll use the reverse method.

31 - 4 = 27,

So how many times, can 5 go into 27?

The closest factor of 5 to 27 is 25.

5 can go in to 27,  5 times.

Continuing on, there is a 2 left over, so the answer to your question is

x = 5 \frac{2}{5}

5 · 5 \frac{2}{5} - 4 = 31

Let me know if I am incorrect and I will attempt to find the right answer for you.

<em>waffletowne</em>

7 0
2 years ago
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Identify the center and radius of the circle (x+4)^2+(y-2)^2=16
fgiga [73]

Answer: center is (-4,2) radius is 4

Step-by-step explanation:

Equation of circle

is (X-A)^2+(X-B)^2=r^2

The center Of The circle is (A, B)

The radius Of The circle is r

Comparing the given equation and the equation of a circle we get the center Of The circle as (-4,2) and then radius as 4

7 0
3 years ago
I need help on number 19 and 20
Alisiya [41]
Answer:

Explanation:

19.

P = 2(x - 3 + 7x + 1)
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20.

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6 0
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A grinding stone completes 175 revolutions before coming to a stop. How many radians did the stone complete
alexandr402 [8]

Answer:

175 * 2 * \pi

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Step-by-step explanation:

8 0
3 years ago
9 and 11 please I need help
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