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barxatty [35]
2 years ago
8

Please help me. I can’t do it

Mathematics
1 answer:
Maslowich2 years ago
6 0

Answer: A) -8

B) - 41

C) - 39

Step-by-step explanation:

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Which is bigger .21 or 21% if they equal the same then let me know as well
DaniilM [7]
It is equal. .21 ia the same as 21%
8 0
3 years ago
Read 2 more answers
The test scores of a geometry class are given below. 90, 75, 72, 88, 85 The teacher wants to find the variance for the class pop
ella [17]
The data given as a whole would be called ungrouped data. Now to get the variance, you will need the formula:

s^2=   <u>Σ(x-mean)^2</u>
                   n      

x = raw data
mean = average of all data
n = no. of observations
s^2 = variance

Now we do not have the mean yet, so you have to solve for it. All you need to do is add up all the data and divide it by the number of observations. 

Data: <span>90, 75, 72, 88, 85        n= 5  
</span>Mean=<u>Σx</u>
            n
Mean = <u>90+75+72+88+85 </u>  = <u>410</u> = 82
                        5                        5

The mean is 82. Now we can make a table using this.

The firs column will be your raw data or x, the second column will be your mean and the third will be the difference between the raw data and the mean and the fourth column will be the difference raised to two. 

90-82 = 8
8^2 =64

75-82 = -7
-7^2 =49

72-82 = -10
-10^2=100

88-82=6
6^2 = 12

85-82=3
3^2=9

Now you have your results, you can now tabulate the data:

 x      mean         x-mean        (x-mean)^2     
90       82                8                      64                       
75       82               -7                      49
72       82              -10                    100
88       82                6                       36
85       82                3                       9

Now that you have a table, you will need the sum of (x-mean)^2 because the sigma sign Σ in statistics, means "the sum of."

64+49+100+36+9 = 258

This will be the answer to your question. The value of the numerator of the calculation will be 258.

 
<u>
</u>
6 0
3 years ago
In the slope-intercept equation of a line, which quantity is given by the coefficient of the x-term? A. The y-intercept of the l
-Dominant- [34]
In any linear equation the coefficient of the x-term represents ALWAYS the slope.

So it is   B. The slope of the line
7 0
3 years ago
3p+6<br> Which phrase represents the algebraic expression 7p-9?
Tresset [83]

Answer:

The answer is the sum of three times a number and six, divided by the difference of seven times the number and nine

Step-by-step explanation:

3p = three x a number

7p = seven x a number

3p+6 = sum of three x a number plus six

7p-9 = difference of seven x the number minus nine

(3p+6)/(7p-9) = sum of three times x number plus six, divided by the difference of seven x the number - nine

6 0
2 years ago
How is 20/12 equivalent to 25/15?
VikaD [51]

Convert them into their simplest forms

20/12 = 10/6 = 5/3

25/15 = 5/3

So, they are equivalent

6 0
2 years ago
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