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Yuri [45]
3 years ago
12

To solve an equation of the form a • bx = d, you should first divide both sides by the coefficient _____.

Mathematics
1 answer:
ddd [48]3 years ago
8 0
We have to isolate x on one side of the equation in order to solve the equation.
So, the very first step would be to divide both the sides by a.

This will leave us with:

bx = d/a

Next divide both sides by b to get x on the left hand side giving us the answer to the equation.

So, the answer to this question is "a"
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An economist conducted a study of the possible association between weekly income and weekly grocery expenditures. The particular
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Answer:

42.1% of variation in the response is explained by the regression line

Step-by-step explanation:

Correlation coefficient is a measure which tells us that how strongly are two variables under study are linearly related to each other i.e correlation coefficient gives the strength of linear association between the variables.

If the magnitude of correlation coefficient is closer to 1, it indicates a strong linear relationship. If the magnitude of correlation coefficient is closer to 0, it indicates a weak linear relationship.

There is another variable known as "Coefficient of Determination", which is equal to square of Correlation Coefficient. Coefficient of Determination tells us that what percentage of variation in the response of the study can be explained by the regression line.

This means, for this question we need to calculate the Coefficient of Determination.

Correlation coefficient = r = 0.649

Coefficient of Determination = R = r² = (0.649)²= 0.421 = 42.1 %

This means that 42.1% of variation in the response is explained by the regression line.

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3 years ago
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erma4kov [3.2K]
The area equation is A = \pi (4)^{2}, which when solved equals 50.24.  That's the third answer on your list.   
5 0
3 years ago
What is the radius of a circle with an area of 78.5 cubic inches? Use 3.14 for pi. Enter your answer in the box.
UkoKoshka [18]

\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ A=78.5 \end{cases}\implies 78.5=\pi r^2\implies \cfrac{78.5}{\pi }=r^2 \\\\\\ \sqrt{\cfrac{78.5}{\pi }}=r\implies 4.9987\approx r

5 0
3 years ago
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