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2 years ago

How do you calculate ?x?=24

Mathematics

1 answer:

White raven [17]2 years ago

7 0

Answer:

divide 24 by 2

Step-by-step explanation:

24/2=12

12x?=24

12/24=2

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What is the slope of the line shown below?

melisa1 [442]

Answer:

C. 2

Step-by-step explanation:

Gradient = $\frac{change in y}{change in x}$

Gradient = $\frac{6}{3}$

Gradient = 2

7 0

1 year ago

Read 2 more answers

Please help me, I forgot how to do this

ANTONII [103]

Answer: 1/7

Step-by-step explanation:

26+6+10=42

6/42=1/7

8 0

1 year ago

What is the equation of the best-fitting regression line? Find this in two ways. First, using the regression analysis part of th

Lemur [1.5K]

Step-by-step explanation:

Regression analysis is used to infer about the relationship between two or more variables.

The line of best fit is a straight line representing the regression equation on a scatter plot. The may pass through either some point or all points or none of the points.

Method 1:

Using regression analysis the line of best fit is: $y=\alpha +\beta x+e$

Here α = intercept, β = slope and e = error.

The formula to compute the intercept is:

$\alpha =\bar y-\beta \bar x$

Here $\bar y$ and $\bar x$ are mean of the y and x values respectively.

$\bar y=\frac{\sum y_{i}}{n} \\\bar x=\frac{\sum x_{i}}{n}$

The formula to compute the slope is:

$\beta =\frac{\sum (x-\bar x)(y - \bar y)}{\sum (x=\bar x)^{2}}$

And the formula to compute the error is:

$e=y-\alpha -\beta x$

Method 2:

The regression line can be determined using the descriptive statistics mean, standard deviation and correlation.

The equation of the line of best fit is:

$(y-\bar y)=r\frac{\sigma_{x}}{\sigma_{y}} (x-\bar x)$

Here r = correlation coefficient = $r=\frac{Cov (x,y)}{\sqrt{\sigma^{2}_{x}\sigma^{2}_{y}} }$

$\sigma_{x}$ and $\sigma_{y}$ are standard deviation of x and y respectively.

$\sigma_{x}=\frac{1}{n}\sum (x-\bar x)^{2} \\\sigma_{y}=\frac{1}{n}\sum (y-\bar y)^{2}$

3 0

2 years ago

What is the answer to 36÷9 using a number line?

Katarina [22]

To divide 36/9 using the number line you have to jump from zero with length of 9 until reach 36, and the result will be the number of jumps.

I do the jumps by steps, but you can draw in the number line:

0. First jump from 0 to 9.

1. Second jump from 9 to 9+9=18.

2. Third jump from 18 to 18+9=27.

3. Fourth jump from 27 to 27+9=36.

4. Great!! We already reach 36.

So, we need four jumps of 9 to reach 36 from 0.

So, the result is 36/9=4

4 0

9 months ago

Given: x + 2y = -6.

wel

very positive about these results

4 0

2 years ago