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3 years ago

Line A passes through the points (1, -1) and (-2, 8).

Mathematics

1 answer:

Viefleur [7K]3 years ago

5 0

The answer to this question will be D

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Find an equation in standard form of the parabola passing through the points

Gnoma [55]

Help. Mnfded tyyyugffghjjbvffyuivvcd

3 0

3 years ago

You work for a soft-drink company in the quality control division. You are interested in the standard deviation of one of your p

frutty [35]

Answer:

Step-by-step explanation:

weight (x) $( x - \overline x)^2$

12.05 0.00123

12 0.00019

11.96 0.00292

12.14 0.0159

12.12 0.00112

11.97 0.0019

11.96 0.0029

12.11 0.0092

11.94 0.0055

11.82 0.038

12 0.00019

12.18 0.028

11.91 0.0108

12.06 0.0021

11.99 0.0029

$\sum x = 180.21$ $\sum (x - \overline x)^2 = 0.12285$

Sample size = 15

$\overline x = \dfrac{180.21}{15} = 12.014$

Sample standard deviation

$x = \sqrt{\dfrac{0.12285}{15-1}}$

$x = 0.0937$

$\text{degree of freedom = n - 1}$

$degree of freedom = 15- 1=14$

$\text{confidence interval} \alpha = 1- 0.98 = 0.02 \\ \\ \alpha/2 = 0.02/2 = 0.01$

$From \ X^2 \ table}$ $\text{, the critical value} X^2 \text{=0.99 for degree of freedom =14 is given by : 4.660}$

$\text{, the critical value} X^2 \text{=0.01 for degree of freedom =14 is given by : 29.141}$

$\text{Thus, the lower limit = 4.660, the upper limit = 29.141}$

$\text{the confidence interval of the standard deviation} \ \sigma \ is:$

$\sqrt{\dfrac{(n -1)s^2}{X^2_{\dfrac{\sigma}{2}}} } \le \sigma \le \sqrt{\dfrac{(n -1)s^2}{X^2_{1-\dfrac{\sigma}{2}}} }$

replacing our values:

$\sqrt{\dfrac{(15 -1)0.0937^2}{29.141} } < \sigma$

$= 0.06495 < \sigma < 0.1624$

$\mathbf{Thus; \ \sigma (0.06495 , 0.1624)}$

3 0

2 years ago

SOMEONE PLEASE HELP ASAP!!!?? ILL GIVE U BRAINLIST

Gnom [1K]

Answer:

110 degrees

Step-by-step explanation:

140-30=110

5 0

3 years ago

Read 2 more answers

How many possible triangles? please help fast

irinina [24]

Answer:

one triangle

Step-by-step explanation:

hope this helps

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2 years ago

Help pleaseeeeeeeeee

harkovskaia [24]

97+x=27+64
x=27+64-97
x=-6

(Hopefully this is correct)

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2 years ago