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Mkey [24]
3 years ago
12

Help please i have to finish soon

Mathematics
1 answer:
Vitek1552 [10]3 years ago
6 0
-2/3 :)))))))))))))))))))))))))
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Suppose a line parallel to side BC of triangle ABC intersects AB and AC at point D and E, respectively. Find the length of AE if
MrRissso [65]

Answer: AE=13

Step-by-step explanation: took test

4 0
3 years ago
What is -x^2+12x-32 in standard form?
Shtirlitz [24]
<span>(<span><span>−x</span>+4</span>)</span><span>(<span>x−8</span><span>) is the simplest form.</span></span>
8 0
3 years ago
While conducting a test of modems being manufactured, it is found that 10 modems were faulty out of a random sample of 367 modem
Kitty [74]

Answer:

We conclude that this is an unusually high number of faulty modems.

Step-by-step explanation:

We are given that while conducting a test of modems being manufactured, it is found that 10 modems were faulty out of a random sample of 367 modems.

The probability of obtaining this many bad modems (or more), under the assumptions of typical manufacturing flaws would be 0.013.

Let p = <em><u>population proportion</u></em>.

So, Null Hypothesis, H_0 : p = 0.013      {means that this is an unusually 0.013 proportion of faulty modems}

Alternate Hypothesis, H_A : p > 0.013      {means that this is an unusually high number of faulty modems}

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

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

where, \hat p = sample proportion faulty modems= \frac{10}{367} = 0.027

           n = sample of modems = 367

So, <u><em>the test statistics</em></u>  =  \frac{0.027-0.013}{\sqrt{\frac{0.013(1-0.013)}{367} } }

                                     =  2.367

The value of z-test statistics is 2.367.

Since, we are not given with the level of significance so we assume it to be 5%. <u>Now at 5% level of significance, the z table gives a critical value of 1.645 for the right-tailed test.</u>

Since our test statistics is more than the critical value of z as 2.367 > 1.645, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u><em>we reject our null hypothesis</em></u>.

Therefore, we conclude that this is an unusually high number of faulty modems.

6 0
3 years ago
The sales tax on a used car is​ $168168​, and the sales tax rate is 55​%. Find the purchase price ​(the price before taxes are​
Naily [24]

Answer:

$92492.40

Step-by-step explanation:

168168.00 - 55% (75675.60)= $92492.40

7 0
3 years ago
PLZ HELP I NEED TO TURN THIS IN TODAY
Cerrena [4.2K]

Answer:

The top one

Step-by-step explanation:

Just count how many are in each catagory

5 0
3 years ago
Read 2 more answers
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