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wariber [46]
3 years ago
9

Nas funções f(x) = -3x+9; f(x) = 2x-4 e f(x) = 5x-5, caso construamos seus respectivos gráficos, informe respectivamente os pare

s ordenados correspondentes aos zeros da função, ou seja, os pares ordenados que indicam onde os gráficos interceptam a abscissa (eixo "X") e a ordenada (eixo y ou f(x)) de cada uma das três funções.Leitura Avançada
{(3,0) e (0,9)}; {(2,0) e (0,-4)}; {(1,0) e (0,-5)}

{(3,0) e (0,9)}; {(2,0) e (0,4)}; {(1,0) e (0,5)}

{(3,0) e (0,9)}; {(2,0) e (0,-4)}; {(1,0) e (0,5)}

{(3,0) e (0,-9)}; {(2,0) e (0,-4)}; {(1,0) e (0,-5)}
Mathematics
1 answer:
Likurg_2 [28]3 years ago
8 0

1st option

{(3,0) e (0,9)}; {(2,0) e (0,-4)}; {(1,0) e (0,-5)}

see screenshot

sorry btw, no hablo espanol

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klasskru [66]

Answer:

The standard error of the mean is 4.5.

Step-by-step explanation:

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The sample is [30mins, 40 mins, 60 mins, 80 mins, 20 mins, 85 mins]. The size of the sample is n=6.

The mean of the sample is:

\bar{x}=\frac{1}n} \sum x_i =\frac{30+40+60+80+20+85}{6}=52.5

The standard deviation of the sample is calculated as:

s=\sqrt{\frac{1}{n-1}\sum (x_i-\bar x)^2} \\\\ s=\sqrt{\frac{1}{5}\cdot ((30-52.5)^2+(40-52.5)^2+(60-52.5)^2+(80-52.5)^2+(20-52.5)^2+(85-52.5)^2}\\\\s=\sqrt{\frac{1}{5} *3587.5}=\sqrt{717.5}=26.8

Then, we can calculate the standard error of the mean as:

\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}=\frac{26.8}{6}= 4.5

6 0
3 years ago
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horrorfan [7]

Answer:

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3 0
3 years ago
What is y=x-4 2x+y=5
ahrayia [7]
If you would like to solve y = x - 4 and 2 * x + y = 5, you can do this using the following steps:

y = x - 4
2 * x + y = 5
_____________
2 * x + (x - 4) = 5
2 * x + x = 5 + 4
3 * x = 9     /3
x = 9 / 3 
x = 3

y = x - 4 = 3 - 4 = -1

The correct result would be x = 3 and y = -1.
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Answer:

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Answer:

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