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otez555 [7]
3 years ago
9

The question is the photo attached. I never asked a question on Brainly so my bad if I did it wrong, I usually just answer quest

ions.

Mathematics
1 answer:
Troyanec [42]3 years ago
4 0
The answers to the questions are

5^48

953^21
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A researcher wishes to estimate within $5 the average repair cost of for a refrigerator. If she wishes to be 90% confident, how
Luda [366]

Answer:

The sample size 'n' = 26

Step-by-step explanation:

<u><em>Explanation</em></u>:-

Given a researcher wishes to estimate within $5 the average repair cost of for a refrigerator

Given estimate "E" = $5

<em>The  estimate within  the average is determined by</em>

<em>                 </em>E = \frac{Z_{0.10}S.D }{\sqrt{n} }<em></em>

<em>  Level of significance    ∝ = 90 % or 10% </em>

<em>                                             = 0.90 or o.10</em>

<em>Z₀.₁₀ = 1.645</em>

                                 E = \frac{Z_{0.10}S.D }{\sqrt{n} }

                             5 = \frac{1.645 X15.50 }{\sqrt{n} }

                        √n =  \frac{25.49}{5} = 5.099

Squaring on both sides , we get

                        n = 26

<u><em>Conclusion</em></u>:-

<em>The sample size 'n' = 26</em>

3 0
3 years ago
present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?
jarptica [38.1K]

<em>Answer:</em>

<em>Let the present ages of man and son be x and y respectively </em>

<em>x+y = 45  </em>

<em> </em>

<em>5 yrs ago , age of man = (x-5) </em>

<em>age of son = (y-5)  </em>

<em>(x-5)(y-5) = 4(x-5) </em>

<em>(y-5) = [4(x-5)] / (x-5) </em>

<em>y-5 = 4. [(x-5) got cancelled out] </em>

<em>y = 9 yrs  </em>

x+y = 45 yrs  

x+9 = 45  

x = 45-9 yrs => 36 yrs  

7 0
3 years ago
NO LINKS!! Use the diagram below to answer the following questions.​
diamong [38]

Answer:

a) WS, ZV, YU

b) VU

c) ZW

d) WXY

e) None

f) TU, TV, UV, XY, XZ, YZ

g) SW, VX, VZ, WX, WZ, YZ

Step-by-step explanation:

A prism is a polyhedron that has:

  • Two bases that are congruent and parallel to each other.
  • Lateral sides that are parallelograms and link the two bases.
  • Height that is the distance between the two bases.

From inspection of the give diagram, the figure appears to be a quadrilateral prism with bases STUV and WXYZ.

<u>Parallel line segments</u>

  • Parallel line segments lie on parallel lines.  
  • Parallel lines are lines on a plane that <u>never meet</u> and are the <u>same distance apart</u>.

a) Segments parallel to XT:

  • WS, ZV, YU

b) Segments parallel to ZY:

  • VU

c) Segments parallel to VS:

  • ZW

<u>Planes</u>

  • A plane is a flat, two-dimensional surface that extends into infinity.  
  • A plane can be named by the letters naming three non-collinear points in the plane.
  • Parallel planes are planes that never intersect.

d) Planes parallel to plane STU:

  • WXY

e) Planes parallel to plane UVZ:

  • None

<u>Skew lines</u>

Skew lines are a pair of non-coplanar lines that:

  • Do <u>not</u> intersect.
  • Are <u>not</u> parallel to each other.

f) Segments skew to SW:

  • TU, TV, UV, XY, XZ, YZ

g) Segments skew to UT:

  • SW, VX, VZ, WX, WZ, YZ
3 0
1 year ago
What is -15x=0 solution
cricket20 [7]
Here is the method for solving that equation:

Step #1:  Write the equation:

             -15x = 0

Step #2:  Divide each side of the equation by -15 :

                 <u>x = 0</u>
3 0
4 years ago
wat iz 9999999999999999999999999999999999999999999999999999999+99999999999999999999999999999999999999999999999999999999999999999
choli [55]
Ahbfiubauehfiouabcbaiu
5 0
3 years ago
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