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Mice21 [21]
3 years ago
14

A study conducted over a period of ten years assessed the income growth of people right out of college. The study began with a s

ample of 76 people, but by they 10th year the study was in contact with only 68 of the original participants.
a) missing data
b) self interest
c) precise numbers
d) voluntary response
Mathematics
2 answers:
Rudiy273 years ago
7 0

Answer:

The correct answer will be option-A

Explanation:

The key components of an investigation are the experiments and the results.

In the given question, since the study was conducted over 76 people for 10 years out of which data of only 68 people were collected after 10 years.

This will lead to disturb the analytical part of the results as the data of 8 experimental samples is missing. Therefore the hypothesis of the experiment would not be tested.

Thus, option-A is the correct answer.

tia_tia [17]3 years ago
5 0
A) missing data because its missing data durr
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Afina-wow [57]

Answer:

His age is 7 years.

Step-by-step explanation:

Let Rehman's  present age be x years.

1 / (x - 3) + 1 /(x + 5) = 1/3

Multiply through by the LCD 3(x - 3)(x + 5):

3(x + 5) + 3(x - 3) = (x + 5)(x - 3)

3x + 15 + 3x - 9 = x^2 + 2x - 15

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x^2 - 4x - 21 = 0

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x = 7  (answer).

6 0
3 years ago
7^16/7^12=7^-18/? what is the missing denominator
creativ13 [48]
\bf \left.\qquad \qquad \right.\textit{negative exponents}\\\\
a^{-{ n}} \implies \cfrac{1}{a^{ n}}
\qquad \qquad
\cfrac{1}{a^{ n}}\implies a^{-{ n}}
\qquad \qquad 
a^{{{  n}}}\implies \cfrac{1}{a^{-{{  n}}}}\\\\
-------------------------------\\\\

\bf \cfrac{7^{16}}{7^{12}}=\cfrac{7^{-18}}{x}\implies x\cdot 7^{16}=7^{12}\cdot 7^{-18}\implies x\cdot 7^{16}=7^{12-18}
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x\cdot 7^{16}=7^{-6}\implies x=\cfrac{7^{-6}}{7^{16}}\implies x=\cfrac{7^{-6}\cdot 7^{-16}}{1}\implies x=7^{-6-16}
\\\\\\
\boxed{x=7^{-22}}\implies x=\cfrac{1}{7^{22}}
4 0
3 years ago
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AlladinOne [14]

Answer:

x^2 - 11x + 24

Step-by-step explanation:

Foil the equation

x^2 - 3x - 8x + 24

x^2 - 11x + 24

8 0
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the art teacher found 3 boxes of brushes and 4 extras brushes. There were 40 brushes in all. how many brushes were in each box
natita [175]
3 boxes times 40 = 120 + 3 = 143
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Step-by-step explanation:

Let the number be X

3×X=3X

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2 years ago
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