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expeople1 [14]
3 years ago
15

Which of the following statements about observational studies is true? A census is always preferable to a sample survey since it

includes the entire population. II. A neutral designer of a survey who has no conscious predisposition toward any particular conclusion can still produce biased data. III. Statistical inference is not necessary when a census is conducted properly. (A) I only (B) II only (C) I and II (D) I and III (E) II and III I.
Mathematics
1 answer:
Rashid [163]3 years ago
5 0

Answer:c

Step-by-step explanation:

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A motorcycle bought for $10,000 depreciates continuously at 9% per annum. What is its value after 7 years?
Stells [14]

Answer:5326

Step-by-step explanation:

A=Pe^rt

4 0
2 years ago
Which of the following is a solution of the system 2x + y = 9 and 3x + 5y = 19.​
Nezavi [6.7K]

2x+y=9

3x+5y=19

I will do this problem in 2 ways. I.)Substitution II.)Elimination

Solution I.) Substitution

We can subtract 2x from both sides in the first equation.

y=9-2x

Now we can substitute the y in the second equation with 9-2x

3x+5(9-2x)=19

-7x+45=19

-7x=-26

x=26/7

y=9-2(26/7)=11/7

Solution II.)Elimination

We can multiply both side of first equation by 5 to get a 5y in both equations.

10x+5y=45

Now because both are positive 5y we just need to do simple subtraction of the 2 equation, each side respectively.

(10x+5y)-(3x+5y)=45-19

7x=26

x=26/7

2*26/7+y=9

y=11/7

Ultimately you get the same answer, both are viable methods, some problems are faster with one method but I recommend mastering both since they are very useful.

4 0
2 years ago
The function f(x) = x^2 - 2x + 8 is transformed such that g(x) = f(x-2). Find the vertex of g(x).
Serjik [45]

Answer:

Step-by-step explanation:

Since g(x) is f(x-2), every time there is a "x" in the f(x) equation, substitute "x-2". So g(x) would be (x-2)^2-2(x-2)+8. Use the method of trial and error: substitute x as 1,-1, and 3, until you found the right vertex. The answer is B (3,7).

7 0
3 years ago
Pls help me solve it!
vekshin1

Answer:

A= 40°

B= 35°

C= 15°

Step-by-step explanation:

Since it says if the triangles were accurately drawn, then A would be the same  degree as Q. C would be the same degree as P. B would be the same degree as R. Since R's degree is missing I knew that a obtuse triangle was 90°. I added 40+15 and got 55. Then i subtracted 90-55 and got 35. So the unknown value would be 35°.

I hope this helps.

3 0
3 years ago
Help i need to pass:/
laila [671]

Answer:

biologists have a 14ft john boat with trolling motor for sale or trade for hipnopotomus

8 0
2 years ago
Read 2 more answers
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