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2 years ago

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A rectangle has side lengths (2x-5) meters and (2x+6) meters. Write a linear expression in simplest form to represent the perime

ter. Find the perimeter if the value of x is 12 meters

1 answer:

RideAnS [48]2 years ago

7 0

I’m pretty sure the answer is 12 expresion

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Scores from an exam are normally distributed with a mean of 85 and a standard deviation of 5. Suppose 188 students take the exam

charle [14.2K]

The mean is $\mu=85$ and standard deviation is $\sigma=5$ . Then the variable $X\sim N(85,5)$ .

Use substitution $Z=\dfrac{X-\mu}{\sigma}=\dfrac{X-85}{5}$ , then the variable $Z\sim N(0,1)$ .

The probability $Pr(X>80)$ can be calculated in the following way:

for X=80, $Z=\dfrac{80-85}{5} =-1$ and $Pr(X>80)=Pr(Z>-1)$ . From the diagram $Pr(Z>-1)=0.34+0.34+0.135+0.025=0.84$ .

Conclusion: if 188 students take the exam, then 188·0.84=157.92 (157) would receive a score above 80

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Right there 125677 on the left you go 4 ahhbsn

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LUCKY_DIMON [66]

= -22-4(-1)
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5.818, 5 9/25, 53/10, 5.81 from least to greatest. THanKs :)

Nastasia [14]

Answer:

53/10, 5 9/25 ; 5.81 ; 5.818

Step-by-step explanation:

To find the solution we need to make some calculations:

53/10 = 5.3

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So we have that the solution is:

53/10, 5 9/25 ; 5.81 ; 5.818

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Answer:

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