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yarga [219]
2 years ago
13

I'm so confused xD picture attached.

Mathematics
2 answers:
marta [7]2 years ago
8 0
The answer would be D because once you write out the equation in the problem it will look like the equation shown in B but that's not simplified in scientific notation so because there are 4 zeros in 10000 you would add 4 to the -14 and -14+4=10
dimulka [17.4K]2 years ago
4 0
B. if you think it is not correct don't put it in
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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
3 years ago
(8,-3) and (8,4)<br> Linear functions
lesya692 [45]

Answer:

\displaystyle x = 8

Step-by-step explanation:

Anything set to equal <em>x</em> is considered an undefined <em>rate of change</em> [<em>slope</em>], which is a <em>vertical line</em>. This is not a function, since it flunks the <em>vertical line test</em>.

I am joyous to assist you anytime.

4 0
3 years ago
A cross country runner Covers 2.5 miles in 12.5 minutes what is the runners average speed in miles per hour
stiks02 [169]
I believe the answer is 5 because if however many times you can multiply 2.5 into 12.5, you get the answer of 5.
8 0
3 years ago
Read 2 more answers
Are the ratios 25/45 and 15/27 proportional? Explain.
liberstina [14]
Write them out as a fraction then reduce them. If theyre the same then its proportional.

25/45 can be cancelled down to 5/9

15/27 can be cancelled down to 3/9

So no theyre not.
6 0
2 years ago
What is the standard form of twenty-one and six hundred thirty-four thousandths
bija089 [108]

Answer:

21,634 is the answer im pretty sure

Step-by-step explanation:

i think

4 0
3 years ago
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