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2 years ago

42 - x = 58 Simplify this plz ASAP

Mathematics

2 answers:

klio [65]2 years ago

6 0

Answer:

x = 16

Step-by-step explanation:

please mark this answer as brainlest

Ad libitum [116K]2 years ago

5 0

Answer:

42-x=58

-x=58-42

x=-58+42

x=-16

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3 years ago

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Daniel [21]

Answer:

The number is $N =1147$ students

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 281$

The standard deviation is $\sigma = 34.4$

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percentage of the would you expect to have a score between 250 and 305 is mathematically represented as

$P(250 < X < 305 ) = P(\frac{ 250 - 281}{34.4 } < \frac{X - \mu }{\sigma } < \frac{ 305 - 281}{34.4 } )$

Generally

$\frac{X - \mu }{\sigma } = Z (Standardized \ value \ of \ X )$

$P(250 < X < 305 ) = P(-0.9012< Z$

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From the z table the value of $P( z_2 < 0.698) = 0.75741$

and $P(z_1 < -0.9012) = 0.18374$

$P(250 < X < 305 ) = 0.75741 - 0.18374$

$P(250 < X < 305 ) = 0.57$

The percentage is $P(250 < X < 305 ) = 57\%$

The number of students that will get this score is

$N = 2000 * 0.57$

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3 years ago

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Ierofanga [76]

Step-by-step explanation:

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Andreas93 [3]

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Step-by-step explanation:

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