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PolarNik [594]
3 years ago
9

Find the number of real number solutions for the equation. x2 – 3x + 8 = 0 1 0

Mathematics
1 answer:
irina1246 [14]3 years ago
4 0
The answer to the equation is 0
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Write -3i + (3/4+2i) - (9/3+3i) as a complex number in standard form
bogdanovich [222]

Answer:

=  -3i + (3/4+2i) - (9/3+3i)

= (3/4 - 9/3) + (-3 + 2 -3)i

= -9/4 -4i

4 0
3 years ago
(Small sample confidence intervals for a population mean) suppose you are taking a sampling of 15 measurements. you find that x=
Luda [366]

Answer:

The 99% confidence interval is  71.67 < \mu < 78.33

Step-by-step explanation:

From the question we are told that

     The sample  size  is  n  =  15

      The  sample  mean is  \= x  =  75

        The  standard deviation is  s =  5

 Given that confidence is  99%  then the level of significance is mathematically represented as

              \alpha  =  100 -  99

             \alpha  =  1\%

             \alpha  =  0.01

Next we obtain the critical values of  \frac{ \alpha }{2} from the normal distribution table

   The  value is

                  Z_{\frac{ \alpha }{2} } = 2.58

Generally the margin for error is mathematically represented as

            E =  Z_{\frac{ \alpha }{2} } *  \frac{ s}{ \sqrt{n} }

=>         E =  2.58  *  \frac{ 5}{ \sqrt{15} }

=>         E =  3.3307

   The  99% confidence interval is mathematically represented as

             \= x  -E  <  \mu  <  \= x  +E

=>          75 -  3.3307 <  \mu

=>          71.67 < \mu < 78.33

3 0
3 years ago
Helpppp i literally have no idea which one it is
SVETLANKA909090 [29]

Ya what the person above me said

7 0
2 years ago
For an upcoming election, 500 registered voters were surveyed on a tax increase. 43% were for a tax increase and 51% were agains
dalvyx [7]
Against a tax increase because either way the margin of error may fall, against will still have more votes
5 0
3 years ago
A map using a scale of 1 inch:5 miles shows a section of land with an area of 3.2 inches what is the actual area of the section
Firlakuza [10]

Answer:

16 miles

Step-by-step explanation:

A scale drawing is a reduced form in terms of dimensions of an original image / building / object

the scale drawing is usually reduced at a constant dimension

scale of the drawing = original dimensions / dimensions of the scale drawing

Actual area = 3.2 x 5 = 16 miles

8 0
3 years ago
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