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goldfiish [28.3K]
2 years ago
5

2x=16

="latex-formula">
​

Mathematics
1 answer:
grin007 [14]2 years ago
6 0
The answer to the question

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A set of mathematics exam scores are normally distributed with a mean of 80.280.280, point, 2 points and a standard deviation of
hichkok12 [17]

Answer:

0.3745

Step-by-step explanation:

Data

mean (\mu): 80

standard deviation (\sigma): 4

Normal distribution table is in figure attached .

Z = \frac{x - \mu}{\sigma
}

Z = (85 - 80)/4 = 1.25

Area below curve = 0.3944

Z = (82 - 80)/4 = 0.5

Area below curve = 0.0199

Proportion of exam scores between 82 and 85?

0.3944 - 0.0199 = 0.3745

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Answer:

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Vertex: (3, 5)

Step-by-step explanation:

Use a graphing calc.

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How can 1/5x-2=1/3x+8 be set up as a system of equation
erik [133]
Hello :
<span>1/5x-2=1/3x+8
let ; y = </span><span>1/5x-2 ..... (1)
       y=1/3x+8  .....(2)
by (1) : 1/5 x =y+2
             x = 5y +10....(*)
by (2) : 1/3x = y-8
             x = 3y-24 ....(**)
(*) :5y-x = -10
(**) : 3y-x =24     ......( last answer )


</span>
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