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DiKsa [7]
3 years ago
7

Which equation of c makes this equation true. 12-9+c =12 Pls only direct answers

Mathematics
2 answers:
alexandr1967 [171]3 years ago
8 0

Answer:

c or 9

Step-by-step explanation:

Naya [18.7K]3 years ago
3 0

Answer:

C: 9

Step-by-step explanation:

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Yuri computes the mean and standard deviation for the sample data set 12, 14, 9, and 21. He finds the mean is 14. His steps for
Tpy6a [65]

Answer:

B. Yuri divided by n instead of n-1

Step-by-step explanation:

It was stated in the question that the dataset was sample dataset. For a sample dataset, the standard deviation is given by the formula,

σ = √ Σ (Xi - mean)²/(n - 1) where i = 1,2,3.....n

Since this is just a sample dataset and not the whole population, Yuri should have divided by n-1 instead of n.

3 0
3 years ago
What is the cube root of -729a^9b^6?<br> -9a^3b^2<br> -9a^2b^<br> -8a^3b^2<br> -8a^2b^3
timurjin [86]

Answer:

= 9a^3b^2

Step-by-step explanation:

\sqrt[3]{-729a^9b^6} =

= ((-9)^3a^9b^6)^{\frac{1}{3}

= (-9)^{3 \times \frac{1}{3}} \times a^{9 \times \frac{1}{3}} \times b^{6 \times \frac{1}{3}}

= (-9)^{1} \times a^{3} \times b^{2}

= -9a^3b^2

7 0
1 year ago
The graph of which function will contain the point(2,10)​
kotegsom [21]

Answer:

point (2 , 10)

Y= 5X

10 = 5(2)

10= 10

3 0
2 years ago
Which does not show a direct variation between x and y?
Zepler [3.9K]
A direct variation is a mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other. In other words, a direct variation is where y = x * (constant).

In answer a, y = x*.5, so it is a direct variation.
In answer c, y = x* \frac{1}{9}, so it is a direct variation.
In answer d, y = x*2, so it is a direct variation,

Only answer b is left, which means the answer must be 'b'. 

We also know 'b' is the answer because it cannot be expressed as <span>y = x * (constant). Instead, it is expressed as </span>y =  \frac{constant}{x}, which is not the same thing and is therefore not a direct variation.

Hope I helped, and let me know if you have any questions :)
8 0
3 years ago
Read 2 more answers
Hi pls answer I'll mark you brainliest​
OLEGan [10]
A) y= -2, 3, 7


B) y= 8, 0, -6


C) y= -8, 1, 7


d) y= 1, -2, -6

7 0
3 years ago
Read 2 more answers
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