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4 years ago

Whats the rate of change?

Mathematics

1 answer:

gogolik [260]4 years ago

4 0

Every time x is added by one, y is added by three.

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Which is greater 0.4 or 0.137

ElenaW [278]

<h2>0.4 is greater </h2>

hope that helps :)

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4 years ago

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33. Suppose that the scores on a statewide standardized test are normally distributed with a mean of 78 and a standard deviation

tino4ka555 [31]

Given the scores on a statewide standardized test are normally distributed

Mean = μ = 78

Standard deviation = σ = 3

Normalize the data using the z-score by using the following formula and chart:

$z=\frac{x-\mu}{\sigma}$

Estimate the percentage of scores of the following cases:

(a) between 75 and 81

so, the z-score for the given numbers will be:

$\begin{gathered} 75\rightarrow z=\frac{75-78}{3}=\frac{-3}{3}=-1 \\ 81\rightarrow z=\frac{81-78}{3}=\frac{3}{3}=1 \end{gathered}$

As shown, the percentage when (-1 < z < 1) = 68%

(b) above 87

$87\rightarrow z=\frac{87-78}{3}=\frac{9}{3}=3$

The percentage when (z > 3) = 0.5%

(c) below 72

$72\rightarrow z=\frac{72-78}{3}=\frac{-6}{3}=-2$

The percentage when (z < -2) = 0.5 + 2 = 2.5%

(d) between 75 and 84

$\begin{gathered} 75\rightarrow z=\frac{75-78}{3}=-\frac{3}{3}=-1 \\ 84\rightarrow z=\frac{84-78}{3}=\frac{6}{3}=2 \end{gathered}$

The percentage when ( -1 < z < 2 ) = 68 + 13.5 = 81.5%

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1 year ago

Y=4x+2=y=2x+-8 what is the value of x

Gnom [1K]

Answer:

x=-5

Step-by-step explanation:

since the y's cancel out, set the first equation equal to the second and solve like you'd normally do.

7 0

4 years ago

WhAt is x + 12 = 4x - 15

mafiozo [28]

Answer:

X = 9

Step-by-step explanation:

X + 12 = 4X - 15

12 + 15 = 4X - X

3X = 27

X = 27 : 3

X = 9

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3 years ago

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Which function has a domain of all real numbers except x=npi, where n is any integers

Liono4ka [1.6K]

The domain of the function given are:
y=cot x
{x∈R: πn<x<π(n+1)} where n any integer

y=csc x
{x∈R: πn<x<π(n+1)} where n any integer

y=cos x

R (all real numbers)

y=sec x

{x∈R:π(n+1/2)<x<π(n+3/2)} where n is all integers.

from above we see that the the function that has a domain of all real numbers except npi is y=cot x and y=csc x

8 0

3 years ago

Whats the rate of change?​

Whats the rate of change?