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2 years ago

(a) In the figure, PQ

Mathematics

1 answer:

Wittaler [7]2 years ago

7 0

Answer:

So I have an Video explain this I don't have enough time to type the answer

Step-by-step explanation:

Click the link below for the video

https:bitly: GET RICK ROLLED OHHHHHHHHHHHHHHHHHHHHHH

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What is the sum of the last four terms of the series 7+9+11+...21

Sidana [21]

For sake of convenience, reverse the series, then it would be:

21,19,17.....7

a=21, d = -2,

s(4) = 4/2 (21+15)

s(4)=2(36)

s(4) = 72

8 0

2 years ago

A car dealership sells 0, 1, or 2 luxury cars on any day. When selling a car, the dealer also tries to persuade the customer to

melisa1 [442]

Answer:

Mean = 1.42

Variance = 0.58

Step-by-step explanation:

Given: X denote the number of luxury cars sold in a given day, and Y denote the number of extended warranties sold.

Also, joint probability function of X and Y are given.

To find:

mean and variance of X

Solution:

From the given joint probability function of X and Y,

$P(X=0)=\frac{1}{6}\\P(X=1)=\frac{1}{12}+\frac{1}{6}=\frac{1+2}{12}=\frac{3}{12}\\P(X=2)=\frac{1}{12}+\frac{1}{3}+\frac{1}{6}=\frac{1+4+2}{12}=\frac{7}{12}$

Mean of X:

$E(X)=\sum XP(X)\\=0\left ( \frac{1}{6} \right )+1\left ( \frac{3}{12} \right )+2\left ( \frac{7}{12} \right )\\=0+\frac{3}{12}+\frac{14}{12}\\=\frac{17}{12}=1.42$

Variance of X:

$E(X^2)=\sum X^2P(X)\\=0^2\left ( \frac{1}{6} \right )+1^2\left ( \frac{3}{12} \right )+2^2\left ( \frac{7}{12} \right )\\=0+\frac{3}{12}+\frac{28}{12}\\=\frac{31}{12}$

$var(X)=E\left [ X^2 \right ]-\left ( E\left [ X \right ] \right )^2\\=\frac{31}{12}-\left ( \frac{17}{12} \right )^2\\=\frac{31}{12}-\frac{289}{144}\\=\frac{372-289}{144}\\=\frac{83}{144}\\=0.58$

5 0

2 years ago

Does anyone know this ? i'm stuck.. i'll give you brainliest and 15 points !! pls show work.

insens350 [35]

Answer:

2y+3 is parallel or the same as QR and PS

5 0

2 years ago

CAN SOMEONE PLS ANSWER THIS QUESTION FAST<br> I WILL MARK BRAINLIEST

Yakvenalex [24]

Answer:

B 5

Step-by-step explanation:

it is the same ratio as the red

8 0

1 year ago

If a population is _______, a sample of the population could be _______.

lord [1]

Answer:

Step-by-step explanation:

If a population is the entire school faculty, a sample of the population could be math teachers.

Always remember a sample is a part of the larger group.

7 0

1 year ago