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4 years ago

Is a biased sample valid

Mathematics

1 answer:

murzikaleks [220]4 years ago

5 0

No a biased sample is not valid

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Line I is shown below Right triangles A B C and DEF are drawn to measure the slope of the line

lina2011 [118]

Answer:

Rise: 8.....Run: 4.... Slope: 2

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3 years ago

Simplify the expression by combining Like Terms: 7d + 12– 4d – 3

KATRIN_1 [288]

3d+9
If you are solving for d then d=-3.
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3 years ago

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A line is graphed below. Write an equation in the form y = mx + b that represents this line

galben [10]

<h3>Explanation</h3>

Slope-Intercept form

$y = mx + b \\ m = slope \\ b = y - intercept$

Calculate the slope with two given coordinate by using rise over run.

$\begin{cases}(x_1,y_1) = ( - 4,0) \\ (x_2,y_2) = ( 0,2) \end{cases}$

These two coordinate points are part of the graph and can be used to find the slope.

$m = \frac{y_2 -y_1 }{x_2 - x_1}$

Substitute the coordinate points in the formula.

$m = \frac{2 - 0}{0 - ( - 4)} \\ m = \frac{2}{ 4} \\ m = \frac{1}{2}$

Therefore, the slope is 2.

Rewrite the equation in slope-intercept.

$y = \frac{1}{2} x + b$

Calculate the y-intercept by substituting any given points in new rewritten equation.

$(x,y) = ( 0,2)$

I will be substituting these coordinate points in the equation.

$y = \frac{1}{2} x + b$

Substitute x = 0 and y = 5 in the equation.

$2 = \frac{1}{2} (0) + b \\ 2 = 0 + b \\ 2 = b$

Therefore the y-intercept is (0,2).

Rewrite the equation.

$y = \frac{1}{2} x + 2$

<h3>Answer</h3>

 $\large \boxed{y = \frac{1}{2} x + 2}$ 

If you have any questions related to the answer, feel free to ask me via comment.

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3 years ago

What is the slope of the line that passes through the points (8,-4) and (6,3) in simplest form

Nesterboy [21]

Step-by-step explanation:

Rise of y-value = (-4) - (3) = -7.

Run of x-value = (8) - (6) = 2.

Slope of the line = Rise / Run = (-7) / (2) = -3.5.

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3 years ago

A 175-inch pipe is cut into two pieces. One piece is four times the length of the other. Find the length of the shorter piece.

nlexa [21]

Answer:

Step-by-step explanation:

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3 years ago