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Olenka [21]
4 years ago
13

Please help, I’m not too smart

Mathematics
1 answer:
Dennis_Churaev [7]4 years ago
4 0

Answer:

x = - 4

Step-by-step explanation:

Given

r(x) = - 5x - 1 and r(x) = 19, then equating the right sides gives

- 5x - 1 = 19 ( add 1 to both sides )

- 5x = 20 ( divide both sides by - 5 )

x = - 4

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26% of college students live in campus housing. a random sample of 15 college students is selected. find the probability that 10
Sloan [31]

Answer:

<em>The probability that 10 or more students will live in campus housing is approximately 0.111%</em>

Step-by-step explanation:

<u>Binomial distribution formula:</u>

<em>If the probability of success is p, then the probability of r successes out of n trials will be:   ^nC_{r}(p)^r(1-p)^n^-^r</em>

26% of college students live in campus housing. So here,  p= 26\%= 0.26

A random sample of 15 college students is selected. So,  n= 15

Now, "10 or more students" means  10 or 11 or 12 or 13 or 14 or 15 students. That means,  r= 10, 11, 12, 13, 14, 15

Thus, the probability that 10 or more students will live in campus housing will be........

[^1^5C_{10}(0.26)^1^0(1-0.26)^5]+[^1^5C_{11}(0.26)^1^1(1-0.26)^4]+[^1^5C_{12}(0.26)^1^2(1-0.26)^3]+[^1^5C_{13}(0.26)^1^3(1-0.26)^2]+[^1^5C_{14}(0.26)^1^4(1-0.26)^1]+[^1^5C_{15}(0.26)^1^5(1-0.26)^0]\\ \\ = 0.00094...+0.00015...+0.00001...+ 0.0000014...+ 0.000000071...+0.0000000016...\\ \\ =0.00111002... =0.111002...\% \approx 0.111\%


3 0
3 years ago
What is bigger 100 fl oz or 16 pt
Romashka [77]
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3 years ago
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How do I solve this:<br><br>180-(2x-40)<br><br>its a geometry problem.
Anastasy [175]

Answer:

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Step-by-step explanation:


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