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mamaluj [8]
3 years ago
9

An experimenter wants to estimate the average water consumption per family in a city. Discuss the relative merits of choosing in

dividual families, dwelling units (single-family houses, apartment buildings, and so on), and city blocks as sampling units. What would you use as a frame in each case?
Mathematics
1 answer:
skelet666 [1.2K]3 years ago
4 0

Answer:

Solution: an Experimenter whats to estimate the average water consumption per family in the city

if individual families are used as the sampling united, a frame could be using censes data or atelephone book

if dwelling are used as the sampli units, aframe could be using Address book or city directory

If city blocks are used as the sampling units, aframe could been using is city directory

Step-by-step explanation:

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galben [10]

Answer: 15r^2-21r+5

Step-by-step explanation:

Given: Perimeter of triangular garden = 25r^2 - 9r + 14

The sum of two sides of the garden = 10r^2 + 12r + 9

Perimeter is the sum of all sides of a triangle.

Third side = Perimeter of triangular garden - sum of two sides of the garden

=25r ^ 2 - 9r + 14-(10r ^ 2 + 12r + 9)\\\\=25r ^ 2 - 9r + 14-10r ^ 2 - 12r - 9\\\\=15r^2-21r+5

The expression represent the third side = 15r^2-21r+5.

5 0
3 years ago
What is the solution set of (x^2+x-6/x-7)<_0
Vlada [557]
X^2 + x - 6 
-------------   <=  0
  x - 7 

(x + 3)(x - 2)
---------------- <= 0
    x - 7

2 critical values are  x = -3 and x = 2

if x <= -3  the  the function <= 0  so that's one part of the solution
also x >= 2
x must be < 7  if its = 7 then the function is indeterminate.  and values between 2 and 7 will give negative valu to function

The answer is  choice A.


5 0
3 years ago
Explain the different ways it is possible to add two rational numbers and get a negative number.
Eduardwww [97]

<u>Answer:</u>

both numbers are negative

negative number is greater than the positive number

<u>Step-by-step explanation:</u>

In order to add two rational numbers and get a negative value, one of two scenarios should occur:

<u>1- both numbers are negative.</u>

2- negative number is greater than the positive number

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2 years ago
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Stella [2.4K]

Answer:

yes

Step-by-step explanation:

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3 years ago
9% of 750............................
babunello [35]
67.5 is your answer.
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