3 years ago

A system of linear equations is shown below where

Mathematics

1 answer:

Brums [2.3K]3 years ago

8 0

Answer:

543

Step-by-step explanation:

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12+4x=5x
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3 years ago

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Can someone help me plz...

S_A_V [24]

Answer:

60 475

95 570

130 700

Step-by-step explanation:

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3 years ago

Tyrell's SAT math score was in the 64th percentile. If all SAT math scores are normally distributed with a mean of 500 and a sta

jarptica [38.1K]

Answer:

$P(x < 535.8) = 0.64$

$P_{64} = 535.8$

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 500

Standard Deviation, σ = 100

We are given that the distribution of SAT score is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find the value of x such that the probability is 0.64

P(X<x) = 0.64

$P( X < x) = P( z < \displaystyle\frac{x - 500}{10})=0.64$

Calculation the value from standard normal z table, we have, $p(z$

$\displaystyle\frac{x - 500}{100} = 0.358\\x = 535.8$

$P(x < 535.8) = 0.64$

$P_{64} = 535.8$

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Ivahew [28]

Answer:

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Step-by-step explanation:

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