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Ronch [10]
3 years ago
14

Plz help! Gonna need to turn it soon

Mathematics
1 answer:
Veseljchak [2.6K]3 years ago
3 0

Answer:

C - 13*

Step-by-step explanation:

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A radio disc jockey has 8 songs on this upcoming hour's playlist: 2 are rock songs, 4 are reggae songs, and 2 are country songs.
mart [117]

Answer:

\displaystyle  \frac{1}{28}

Step-by-step explanation:

we are given 8 songs

2 are <em>rock.</em><em> </em>4 are <em>reggae</em>, 2 are <em>country</em>

we want to figure out the probability of getting both reggae songs

notice that, they aren't replacing thus it's an independent probability

recall that,

\displaystyle \rm P(A  \:  \text{and} \: B) = P(A) \times P(B \mid A)

P(A) represents the chance of getting our subject first time and P(B|A) represents the chance of getting the same subject second time

let's figure out P(A)

we have 2 reggae songs

and total 8 songs

therefore

\displaystyle\rm P(A) =  \frac{2}{8}  =  \frac{1}{4}

let's figure out P(B|A)

since we took a reggae song before now we have only a reggae song

and total 8-1=7

therefore

\displaystyle  \rm P(B\mid A) =  \frac{1}{7}

Altogether

\displaystyle \rm P(A  \:  \text{and} \: B) = \frac{1}{4}  \times  \frac{1}{7}

simplify multiplication:

\displaystyle \rm P(A  \:  \text{and} \: B) = \frac{1}{28}

And we are done!

7 0
3 years ago
the drama club has sold 942 tickets to their play if their theater seats 57 in each row how many full rows will be will there be
Triss [41]
There will be 235 rows fully filled but there will be half of one row that is extra
6 0
3 years ago
Simplify the expression. <br> −9(−2 − 8) + (−16) −8
Xelga [282]

Answer:

66

Step-by-step explanation:

Open the parentheses, 18 + 72 - 16 - 8 = 66

7 0
3 years ago
Read 2 more answers
Which of the following should be avoided when proving a trigonometric identity?
White raven [17]

Answer:

cosine

Step-by-step explanation:

fundamental trigonometric identities

7 0
3 years ago
What is the equation of the following line? be sure to scroll down first to see all answer options
andreyandreev [35.5K]

Answer:

The equation for the following graph:

y = -\frac{1}{5}x

Step-by-step explanation:

- You first need to find the slope by using the <u>slope formula</u>:

m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}

(where (x_{1},y_{1}) is the first point and (x_{2}, y_{2}) is the second point)

-Use the given points (0,0) and (10, -2) from the graph for the formula:

m = \frac{-2 - 0}{10 - 0}

Then, you solve:

m = \frac{-2 - 0}{10 - 0}

m = -\frac{1}{5}

After you have found the slope, use the slope -\frac{1}{5} and the first point (0,0) for the <u>point-slope formula:</u>

y - y_{1} = m ( x - x_{1})

<u>(</u>where m is the slope and (x_{1}, y_{1}) is the first point)

y - 0 = -\frac{1}{5}  ( x - 0)

Then, you solve:

y - 0 = -\frac{1}{5}  ( x - 0)

y - 0 = -\frac{1}{5}x - 0

y - 0 + 0 = -\frac{1}{5} - 0 + 0

y = -\frac{1}{5}x

So, the equation for the following graph is y = -\frac{1}{5}x .

7 0
3 years ago
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