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Rus_ich [418]
3 years ago
10

Only I need help with 1,2 and three please

Mathematics
1 answer:
Mazyrski [523]3 years ago
4 0
Is that the whole thing?

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What is the slope of this line?
OLga [1]
The slope of this line is -2. 

rise/run

rise = 4 
run = -2 
  
      4 
   ------- = -2
     -2 

Using the points (1,0) & (0,2)

     2 - 0         2
  ----------- = ----- = -2
    0 - 1         -1

6 0
3 years ago
Read 2 more answers
Suppose a consumer group suspects that the proportion of households that have three cell phones NOT known to be 30%. A cell phon
leva [86]

Answer:

We conclude that the actual percentage of households is equal to 30%.

Step-by-step explanation:

We are given that a consumer group suspects that the proportion of households that have three cell phones NOT known to be 30%.

Their marketing people survey 150 households with the result that 43 of the households have three cell phones.

Let p = <u><em>proportion of households that have three cell phones NOT known.</em></u>

So, Null Hypothesis, H_0 : p = 30%      {means that the actual percentage of households is equal to 30%}

Alternate Hypothesis, H_A : p \neq 30%     {means that the actual percentage of households different from 30%}

The test statistics that would be used here <u>One-sample z-test for proportions;</u>

                                T.S. =  \frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n} } }  ~ N(0,1)

where, \hat p = sample proportion of households having three cell phones = \frac{43}{150} = 0.29

           n = sample of households = 150

So, <u><em>the test statistics</em></u>  =  \frac{0.29-0.30}{\sqrt{\frac{0.30(1-0.30)}{150} } }  

                                     =  -0.27

The value of z test statistic is -0.27.

<u>Also, P-value of the test statistics is given by;</u>

              P-value = P(Z < -0.27) = 1 - P(Z \leq 0.27)

                            = 1 - 0.6064 = <u>0.3936</u>

<u>Now, at 1% significance level the z table gives critical value of -2.58 and 2.58 for two-tailed test.</u>

Since our test statistic lies within the range of critical values of z, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which <em><u>we fail to reject our null hypothesis</u></em>.

Therefore, we conclude that the actual percentage of households is equal to 30%.

4 0
3 years ago
Help quickly!!
qaws [65]

Answer:

2 x

— = —

25 700

700(2)= 25(x)

1400/25=x

x=56

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
To the nearest whole number, what is the surface area of a sphere with a volume of 140 cm³?
rjkz [21]

The answer to this question is B. 130cm^2.

Using the volume formula for a sphere (V = (4/3)πr^3) you can plug in the values that we know to find the radius to be around 3.22117 cm. You can then use the area of a sphere formula (A = 4πr^2) to find the area. Hope this helps :)

6 0
3 years ago
If your expenses are more than your income, then you have a positive net cash flow.
son4ous [18]
False because you dont have the full amount of income you need
7 0
3 years ago
Read 2 more answers
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