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snow_lady [41]
3 years ago
8

Please help asap 20 pts

Mathematics
2 answers:
expeople1 [14]3 years ago
5 0
B. If you were to solve for x, the values would be x=1.5275 and x=-1.5275.
Flauer [41]3 years ago
4 0
9x^2 - 21 = 0
sqrt (all of the above)
3x - 4.58 = 0
x = 1.53

checking answer please hold...

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You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on con
Naddika [18.5K]

Answer:

The sample size is    n = 68

Step-by-step explanation:

From the question we are told that

    The margin of error is  E = 5 \ years

     The standard deviation is  \sigma = 22

From the question we are told the confidence level is  94% , hence the level of significance is    

      \alpha = (100 - 94 ) \%

=>   \alpha = 0.06

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.881

Generally the sample size is mathematically represented as  

   n = [\frac{Z_{\frac{\alpha }{2} } *  \sigma }{E} ] ^2

=>  n = [\frac{1.881 } *  22 }{5} ] ^2

=>  n = 68

8 0
3 years ago
Solve please. Correctly<br> -2x + 5x = 3x - 3
Ugo [173]
3x=3x -3 which would equal infinite or no solution. Hope this helps !
8 0
3 years ago
Read 2 more answers
Please help me find 'x' your help would be much appreciated <br><br><br> -Thanks
Vladimir79 [104]

Answer:

x=25.

Step-by-step explanation:

We know because of corresponding angles, the sum of the angle adjacent to (2x-5) and (2x-5) is 180 degrees

2x-5+5x+10=180

7x+5=180

7x=175

x=25

4 0
3 years ago
The owner of a store buys large boxes of candy bars from a warehouse and repackages them to
Schach [20]

Answer:

This should explain it

Step-by-step explanation:

If its the graph question I think it is this is the answer screenshot.

4 0
3 years ago
Write a number of grams between 10 and 20, and then write an equivalent amount in milligrams.
oksano4ka [1.4K]

Answer:

15 grams and 15000 milligrams

Step-by-step explanation:

3 0
2 years ago
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