In this diagram, m DCB = ???

Mathematics

1 answer:

Elza [17]4 years ago

7 0

Answer:

56°

Step-by-step explanation:

The two marked angles are supplementary, so total 180°.

(2x +8) +(x -2) = 180

3x +6 = 180 . . . . . . . . . . collect terms

x + 2 = 60 . . . . . . . . . . . divide by 3

x = 58 . . . . . . . . . . . . . . subtract 2

∠DCB = x-2 = 58 -2

∠DCB = 56

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Answer:

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Mrs. cugini collected data on the hand span length and height of each of her Algebra 1 students.

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<h3>a. slope = $\displaystyle m=\frac{15}{2}$ </h3><h3>b. slope = m = positive = positive correlation = two sets of data increase together</h3><h3>Further explanation</h3>

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Regression

$\displaystyle m=\frac{N\sum (xy)-\sum x\sum y }{ N\sum (x^2)-(\sum x)^2}$

Because data is in the form of numbers from the hand span length and height of each of students. not displayed clearly, then we make a line directly by making points on the graph above and below the line as much as possible to be balanced

We specify 2 points that are crossed by a line, for example:

(6.45) and (8.60)

slope (m) = change in y / change in x

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