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wolverine [178]
3 years ago
6

If the mean is 4, what is the missing number of the data set: 3, 4, ___, 7, 2, 1.

Mathematics
1 answer:
kodGreya [7K]3 years ago
4 0

Answer:

7

Step-by-step explanation:

Let the missing number of the data be x.

\because mean =  \frac{3 + 4 + x + 7 + 2 + 1}{6}  \\  \\ \therefore 4 = \frac{17 + x }{6}  \\  \\ \therefore 4 \times 6 = 17 + x \\  \\ \therefore 24 - 17 = x \\  \\\therefore x = 7

Thus, the missing number of the data is 7.

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a rally car course covers 51 5.97 miles .the winning car completed the course in 6.5 hours. what was the average speed of the wi
Artyom0805 [142]
Assuming the speed is in miles per hour, simply divide the total distance by time.
515.97/6.5
The answer is 79.38 miles per hour
5 0
3 years ago
A classic counting problem is to determine the number of different ways that the letters of millennium can be arranged. Find tha
Eddi Din [679]

Answer:

<u>The correct answer is that the number of different ways that the letters of the word "millennium" can be arranged is 226,800</u>

Step-by-step explanation:

1. Let's review the information provided to us to answer the question correctly:

Number of letters of the word "millennium" = 10

Letters repeated:

m = 2 times

i = 2 times

l = 2 times

n = 2 times

2. The number of different ways that the letters of millennium can be arranged is:

We will use the n! or factorial formula, this way:

10!/2! * 2! * 2! * 2!

(10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1)/(2 * 1) * (2 * 1) * (2 * 1) * (2 *1)

3'628,800/2*2*2*2 = 3'628,800/16 = 226,800

<u>The correct answer is that the number of different ways that the letters of the word "millennium" can be arranged is 226,800</u>

7 0
2 years ago
Real numbers are always rational numbers
DiKsa [7]
Yes, real numbers are always rational numbers
8 0
2 years ago
Helpppp PLEASEEE AHHHHHH
Allisa [31]

Answer:

24

Step-by-step explanation:

18+12-6

6 0
2 years ago
Read 2 more answers
Step by step please help answer.
sweet-ann [11.9K]

Answer:

(2) 2,640 ft

Step-by-step explanation:

I'm going to assume that in this question, you are walking 1 full circle around the reservoir. That would mean you need to calculate the circumference of the circular reservoir.

The circumference formula is:

C = ⫪d

C stands for Circumference

d stands for diameter

I will use 22/7 instead of pi, so the formula looks more like this:

C = (22/7)(d)

The diameter is 840 feet, so we will substitute the variable d with 840:

C = (22/7)(840)

You can plug this part into the calculator, but by hand, it'll look something like this:

(22/7)*840 = (22*840)/7

18,480/7 = 2.640

Hope it helps (●'◡'●)

5 0
2 years ago
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