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kherson [118]
3 years ago
11

Which is the solution to the system of equations?

Mathematics
1 answer:
Ivenika [448]3 years ago
4 0

Answer:

D. (2, -3/4)

Step-by-step explanation:

y=1/8x-1

-5x+4y=-13

5x+4(1/8x-1)=-13

x=2

y=1/8x2-1

y=-3/4

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654

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Which of the following is used to determine the significance of predictions made by a best fitting linear equation?A. correlatio
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Answer:

D. method of least squares

Step-by-step explanation:

The Least Squares Method (LSM) is a mathematical method used to solve various problems, based on minimizing the sum of the squared deviations of some functions from the desired variables. It can be used to “solve”                  over-determined systems of equations (when the number of equations exceeds the number of unknowns), to find a solution in the case of ordinary (not redefined) linear or nonlinear systems of equations, to approximate the point values ​​of a function. OLS is one of the basic regression analysis methods for estimating the unknown parameters of regression models from sample data.

Correlation analysis is a statistical method used to assess the strength of the relationship between two quantitative variables. A high correlation means that two or more variables have a strong relationship with each other, while a weak correlation means that the variables are hardly related. In other words, it is a process of studying the strength of this relationship with available statistics.

Analysis of Variance (or ANOVA) is a collection of statistical models used to analyze group averages and related processes (such as intra- and inter-group variation) in statistical science. When using Variance Analysis, the observed variance of a specified variable is divided into the variance component that can be based on different sources of change. In its simplest form, "Analysis of Variance" is a inferential statistical test to test whether the averages of several groups are equal or not, and this test generalizes the t-test test for two-groups to multiple-groups. If multiple two-sample-t-tests are desired for multivariate analysis, it is clear that this results in increased probability of type I error. Therefore, the variance analysis would be more useful to compare the statistical significance of three or more means (for groups or for variables) with the test.

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5 0
3 years ago
11,13,15,17 I need help with
natima [27]

Step-by-step explanation:

[ Refer to the attached file ]

( Slide to refer all files )

________________________________

• To solve Questions of type 11 we need to simplify the equation by using mathematical operations !!

• To solve Questions of type ( 13 , 15 and 17 ) we try to make the bar numeral to come other side of decimal

° and by subtracting we get the required fraction !!

<h2 />

5 0
3 years ago
Read 2 more answers
What is the best approximation of 6% tax on a $102 purchase? A) $6 B) $12 C) $18 D) $24
larisa [96]
Here, On Approximation, Just consider $102 as $100

Then, 6% of 100 would be: $6 

In short, Your Answer would be: Option A

Hope this helps!
6 0
2 years ago
A plane is an undefined term because it
igor_vitrenko [27]
No on can explain it but it has a definition.
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3 years ago
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