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algol13
3 years ago
5

Help plzz grades at my school are do this weekend

Mathematics
2 answers:
finlep [7]3 years ago
5 0
Ummm...you need to either insert an image of your problem, or type it out If you want people to solve it....
LUCKY_DIMON [66]3 years ago
5 0

Answer:i will help!!

Step-by-step explanation:

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What exclusions are placed on the variable x for the fraction 4x^2-1/4x+2
aalyn [17]
Below are the choices:

<span>-1/2
0
 -1
 non
</span>
The  exclusions are placed on the variable x for the fraction 4x^2-1/4x+2 is -1/2. Below is the solution, 

<span>4x+2 = 0 so 4x=-2 so x=-2/4 wich is -1/2</span>
7 0
3 years ago
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A local car dealer claims that 25% of all cars in San Francisco are blue. You take a random sample of 600 cars in San Francisco
sammy [17]

Answer:

No, we can't reject the dealer's claim with a significance level of 0.05.

Step-by-step explanation:

We are given that a local car dealer claims that 25% of all cars in San Francisco are blue.

You take a random sample of 600 cars in San Francisco and find that 141 are blue.

<u><em>Let p = proportion of all cars in San Francisco who are blue</em></u>

SO, Null Hypothesis, H_0 : p = 25%   {means that 25% of all cars in San Francisco are blue}

Alternate Hypothesis, H_A : p \neq 25%   {means that % of all cars in San Francisco who are blue is different from 25%}

The test statistics that will be used here is <u>One-sample z proportion</u> <u>statistics</u>;

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

where, \hat p = sample proportion of 600 cars in San Francisco who are blue =   \frac{141}{600} = 0.235

            n = sample of cars = 600

So, <u><em>test statistics</em></u>  =  \frac{0.235-0.25}{{\sqrt{\frac{0.235(1-0.235)}{600} } } } }

                               =  -0.866

<em>Now at 0.05 significance level, the z table gives critical values of -1.96 and 1.96 for two-tailed test. Since our test statistics 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 we fail to reject our null hypothesis.</em>

Therefore, we conclude that 25% of all cars in San Francisco are blue which means the dealer's claim was correct.

4 0
3 years ago
Which table represents a nonlinear function? x y 2 -9 4 1 6 11 x y 2 -14 4 -16 6 -18 x y 2 0 4 6 6 16 x y 2 -9 4 -6 6 -3
OverLord2011 [107]
The Third one, Y jumps from 0 to 6 then 16
8 0
3 years ago
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342 is the product of q and 214
Law Incorporation [45]

Answer:

What's the question?

Step-by-step explanation:

342 is the product of q and 214

7 0
2 years ago
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I need someone to talk to quick
WINSTONCH [101]

Answer:

okay

Step-by-step explanation:

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