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Zinaida [17]
1 year ago
5

A researcher wants to develop a product for families who have small children. He needs to determine if there is a nationwide int

erest in a toy that will help children describe their emotions. He asks only a sample of the population to complete his survey. What should be true of the sample so that the results of the survey can be used to predict the results of surveying the population?
The size of the sample should be the same size as the population.
The families included in the sample should represent the families in the population.
The families included in the sample cannot be included in the population.
The size of the sample should be larger than the size of the population.
Mathematics
2 answers:
erma4kov [3.2K]1 year ago
4 0

Answer:

B.The families included in the sample should represent the families in the population.

Step-by-step explanation:

krok68 [10]1 year ago
3 0

Answer:

b

Step-by-step explanation:

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Express x in term of y:x/7+2y=6​
lions [1.4K]

Answer:

You have to multiply the denorminator to both sides in order to make x the subject :

\frac{x}{7 + 2y}  = 6

x = 6(7 + 2y)

8 0
1 year ago
Which statements correctly describe the cosine and sine functions? Check all that apply. The cosine function increases on (90°,
Jet001 [13]

Answer:

The three correct answers are B "The sine function increases on (0°, 90°) and (270°, 360°)." , E "Both the cosine and sine functions have a maximum value of 1.", and F "Both the cosine and sine functions are periodic."

Step-by-step explanation:

Hope this helps <3

4 0
1 year ago
On a number​ line, the coordinates of​ X, Y,​ Z, and W are ​, ​, ​, and ​, respectively. Find the lengths of the two segments be
Arturiano [62]

Complete Question:

On a number​ line, the coordinates of​ X, Y,​ Z, and W are −8​, −5​, 4​, and 6​, respectively. Find the lengths of the two segments below. Then tell whether they are congruent. \overline{XY} and \overline{ZW}

Answer:

\overline{XY} = 3

\overline{ZW} = 2

They are not congruent

Step-by-step explanation:

Length of segment XY:

Coordinate of X = -8

Coordinate of Y = -5

\overline{XY} = |-8 -(-5)| = |-8 + 5| = 3

Length of ZW:

Coordinate of Z = 4

Coordinate of W = 6

\overline{ZW} = |4 - 6| = 2

\overline{XY} ≠ \overline{ZW}, therefore, they are not congruent.

3 0
2 years ago
What is the coefficient of the following expression? 7c + 8
zloy xaker [14]

Answer:

3. 7

7 is the coefficient.

3 0
2 years ago
Rita is planting saplings along her garden fence. When she started, she had x packages of saplings with 5 saplings per package.
weqwewe [10]

Answer:

If we represent x (number of packages of saplings) on a number line graph, it will start on number 4 (number of packages Rita still has) then moves to the right to number 7, that is the number of packages when Rita started to plant.

Step-by-step explanation:

7 0
1 year ago
Read 2 more answers
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