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3 years ago

Help please Fast! Also explain! please

Mathematics

1 answer:

soldier1979 [14.2K]3 years ago

6 0

Good luck without a picture

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4x-5y=20 find the slope

Irina18 [472]

$4x-5y=20 \\
-5y=-4x+20\\
y=\frac{4}{5}x-4$

It's $\frac{4}{5}$

5 0

3 years ago

Read 2 more answers

It has been hypothesized that the standard deviation of the germination time of radish seeds is 8 days. The standard deviation o

Yanka [14]

Answer:

$\chi^2 =\frac{60-1}{64} 36 =33.19$

The degrees of freedom are:

$df= n-1= 60-1= 59$

And the p value would be given by:

$p_v =2*P(\chi^2 >33.19)=0.0053$

Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true deviation is different from 8 days.

Step-by-step explanation:

Data given

$n=60$ represent the sample size

$\alpha=0.01$ represent the confidence level

$s^2 =6^2 =36$ represent the sample variance obtained

$\sigma^2_0 =8^=64$ represent the value that we want to test

Hypothesis to test

We want to verify if the true deviation is equal to 8 days o not, so the system of hypothesis would be:

Null Hypothesis: $\sigma^2 = 64$

Alternative hypothesis: $\sigma^2 \neq 64$

The statistic is given by:

$\chi^2 =\frac{n-1}{\sigma^2_0} s^2$

Replacing we got:

$\chi^2 =\frac{60-1}{64} 36 =33.19$

The degrees of freedom are:

$df= n-1= 60-1= 59$

And the p value would be given by:

$p_v =2*P(\chi^2 >33.19)=0.0053$

Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true deviation is different from 8 days.

6 0

3 years ago

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JulsSmile [24]

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3 0

3 years ago

Read 2 more answers

PLEASE HURRY<33 Graph the following piecewise function. f(x)={x^2+2 if -5

Lina20 [59]

The graph for the first is line segment joining (x, y) = (−2,−4)and (2, 4), sans the end points. The second part is the line through (-2, -6) and (-3, -9), from (-2, -6), excepting (-2, -6). ..

Step-by-step explanation: you are using y for the piecewise function.

6 0

3 years ago

There are 42 female performers in a dance recital. The ratio of men to women is 4:7. How many men are in the dance recital?

marusya05 [52]

Answer:

24

Step-by-step explanation:

The first thing I did was divide 42 by 7 to get the equivilant for 1.

42 ^ 7 = 6

So,

1 = 6

This means that all you have to do to get the amount of men is to multiply 4 by 6.

4 * 6 = 24

So, there are 24 men and 42 females.

Hope this helps!

5 0

3 years ago