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Tatiana [17]
3 years ago
14

7x+23+21x-11=180 how do you set up the equation right?

Mathematics
2 answers:
harkovskaia [24]3 years ago
7 0

28x=168

x=6

that is the answer I guess

blondinia [14]3 years ago
4 0

Answer:

I'm not sure what you mean by set up the equation, however X=6

Step-by-step explanation:

first you add the 7x with 21x

so you have 28x+23-11=180

second step is subtracting 11 from 23

so now you have 28x+12=180

the third step is 28x+12-12=180-12

so you have 28x=168

and the you divid both sides by 28 and you get 6

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Answer:

0.4

Step-by-step explanation:

Let X be the random variable that represents the number of consecutive days in which the parking lot is occupied before it is unoccupied. Then the variable X is a geometric random variable with probability of success p = 2/3, with probability function f (x) = [(2/3)^x] (1/3)

Then the probability of finding him unoccupied after the nine days he has been found unoccupied is:

P (X> = 10 | X> = 9) = P (X> = 10) / P (X> = 9). For a geometric aeatory variable:

P (X> = 10) = 1 - P (X <10) = 0.00002

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Thus, P (X> = 10 | X> = 9) = P (X> = 10) / P (X> = 9) = 0.00002 / 0.00005 = 0.4.

6 0
3 years ago
A regression by a sample of 10 observations gives: Score=49.5+1.96 Study Hours. The sample mean of study hour is 10.5 and sum of
amm1812

Answer:

0.1463

Step-by-step explanation:

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3 years ago
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