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3 years ago

“I think of a number, multiply it by 2, subtract 3 and multiply the result by 4."

Mathematics

1 answer:

Scorpion4ik [409]3 years ago

5 0

Answer:

33x2=66

66-3=62

62x4=248

Is this a question for a test cause if it is i'm gonna feel embarrassed

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Imagine that you have entered the following distribution of scores into the program: 7, 9, 6, 3, 7, 8, 4, 10, 7, 9. The mean of

ozzi

Answer:

Step-by-step explanation:

Mean refers to the average value of the set of data.

It is the central value of the set of data.

Another word for Mean is average.

Given scores:7, 9, 6, 3, 7, 8, 4, 10, 7, 9

Solution:

Sum of observations = $7+ 9+ 6+ 3+ 7+ 8+ 4+ 10+ 7+ 9=70$

Number of observations = 10

Mean = Sum of observations/Number of observations = $\frac{70}{10}=7$

If observation 3 is removed:

Sum of observations = $7+ 9+ 6+ 7+ 8+ 4+ 10+ 7+ 9=67$

Number of observations = 9

Mean = Sum of observations/Number of observations = $\frac{67}{9}=7.44$

If observation 4 is removed:

Sum of observations = $7+ 9+ 6+ 3+ 7+ 8+ 10+ 7+ 9=66$

Number of observations = 9

Mean = $\frac{66}{9}=7.3$

If observation 6 is removed:

Sum of observations = $7+ 9+ 3+ 7+ 8+ 4+ 10+ 7+ 9=64$

Number of observations = 9

Mean = $\frac{64}{9}=7.1$

If observation 7 is removed:

Sum of observations = $9+ 6+ 3+ 8+ 4+ 10+ 9=49$

Number of observations = 7

Mean = $\frac{49}{7}=7$

If observation 8 is removed:

Sum of observations = $7+ 9+ 6+ 3+ 7+ 4+ 10+ 7+ 9=62$

Number of observations = 9

Mean = $\frac{62}{9}=6.9$

If observation 9 is removed:

Sum of observations = $7+ 6+ 3+ 7+ 8+ 4+ 10+ 7=52$

Number of observations = 8

Mean = $\frac{52}{8}=6.5$

If observation 10 is removed:

Sum of observations = $7+ 9+ 6+ 3+ 7+ 8+ 4+ 7+ 9=60$

Number of observations = 9

Mean = $\frac{60}{9}=6.7$

Therefore, mean of this distribution of scores would be changed the most if a score 3 was removed from the data set.

6 0

4 years ago

What number needs to be added to both sides of the equation in order to complete the square?

Sever21 [200]

x^2+14x = (x+7)^2

7^2 = 49

so you would add 49 to both sides

5 0

3 years ago

Read 2 more answers

5x^2=45 what is x? ahh I need help.. anyone?

Tema [17]

<span>5x^2 = 45</span>

Divide each side by 5 :

x^2 = 9

Take the square root of each side:

x = +3 or -3 .

Did I go too fast for you ?

3 0

3 years ago

Read 2 more answers

Select the correct answer. What is the imaginary part of the complex number plotted on this graph? A. 3 B. -2i C. -2 D. 3i

Greeley [361]

So, let's see... It is easy to notice that for 3 out of the 4 numbers, there is a relationship between the x and the y coordinate of the number; for 3+i, -2i, -2-4i we have that the real part is larger by 2 from the imaginary part. Thus, the points are on the same line in the imaginary plane; they satisfy x=y+2 or Re{z}=Im{z}+2. However, 2-4i does not satisfy this equation since 2 is not equal to -4+2. Hence, this point does not belong to the line that the other 3 points define.

5 0

4 years ago

What is the length of the unknown leg of the right triangle for 7 feet and 9 feet? Plz help, I'll do anything.

maxonik [38]

Answer:

$\sqrt{130}$

Step-by-step explanation:

If you are trying to find the hypotenuse, then you want to use the equation a^2 + b^2= c^2

1. 7^2 + 9^2=c^2

2. 49+81=c^2

3. c^2=130

4. Square root both sides

6 0

3 years ago