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matrenka [14]
3 years ago
15

WHERE ARE THE EXPERTS AND ACE!!!!!!! I NEED HELP PLS SHARE YO SMARTNESS!!!!! WILL GIVE BRAINLIEST AND RATE AND VOTE!!!

Mathematics
1 answer:
zmey [24]3 years ago
8 0

Answer:

D and C

Step-by-step explanation:

1) You can cross check using desmos.

2) cos(120) is - 0.5

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Sum of two numbers is 38, one number is 36 more than the other. find the numbers
goldfiish [28.3K]
One number is 1 and the other one is 37. Coz u can make two variables x and y then make two functions x+y=38 and x-y=36 then solve it
3 0
3 years ago
Given the vectors w = <-5, 3> and z = <1, 4>, find the results of the vector subtractions. -w − z =
kvasek [131]

Answer:

< 4, - 7 >

Step-by-step explanation:

- w - z

= - < - 5, 3 > - < 1, 4 > ← multiply each component in w by - 1

= < 5, - 3 > - < 1, 4 > ← subtract corresponding components

= < 5 - 1, - 3 - 4 >

= < 4, - 7 >

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3 years ago
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Masteriza [31]

Answer:

The proportions differ from those reported in the survey.

Step-by-step explanation:

The Chi-square goodness of fit test would be used to determine whether the proportions differ from those reported in the survey.

The hypothesis for the test can be defined as follows:

<em>H</em>₀: The proportions does not differ from those reported in the survey.

<em>Hₐ</em>: The proportions differ from those reported in the survey.

Assume that the significance level of the test is, α = 0.01.

The Chi-square test statistic is given by:

\chi^{2}=\sum\limits^{n}_{i=1}{\frac{(O_{i}-E_{i})^{2}}{E_{i}}}

Consider the Excel sheet provided.

The Chi-square test statistic value is 191.32.

The <em>p</em>-value of the test is:

p-value=P(\chi^{2}_{(n-1)}>191.32)\\\\=\text{CHISQ.DIST.RT}(191.32,2)\\\\=0.0000

The <em>p</em>-value of the test is very small. The null hypothesis will be rejected at 1% level of significance.

Thus, concluding that the proportions differ from those reported in the survey.

5 0
3 years ago
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erastovalidia [21]
The scale factor 0.05 refers to length, so for area the scale factor is 0.05²=0.0025.

We then multiply: 220 ft²*0.0025=0.55 ft² (choice A)
8 0
3 years ago
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Solve the equation. PLS
pochemuha

Answer:

n= 26, so the answer would be 'B'.

Step-by-step explanation:

n-8=18

n=18+8

n=26

4 0
3 years ago
Read 2 more answers
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