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yaroslaw [1]
3 years ago
14

Two students are to be selected at random from a class with 10 girls and 12 boys. what is the probability that both will be girl

s?
Mathematics
1 answer:
Travka [436]3 years ago
7 0
There is an 83% chance that it will be girls
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Complete the equation of the line through (-9,-9) and (-6,0)
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For this case we have that by definition, the equation of the line of the slope-intersection form is given by:

y = mx + b

Where:

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b: It is the cut-off point with the y axis.

According to the data of the statement we have the following points:

(x_ {1}, y_ {1}): (- 9, -9)\\(x_ {2}, y_ {2}): (- 6,0)

We found the slope:

m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}} = \frac {0 - (- 9)} {- 6 - (- 9)} = \frac { 9} {- 6 + 9} = \frac {9} {3} = 3

Thus, the equation is of the form:

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We substitute one of the points and find b:

0 = 3 (-6) + b\\0 = -18 + b\\b = 18

Finally, the equation is:

y = 3x + 18

Answer:

y = 3x + 18

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