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Effectus [21]
3 years ago
11

Identify the problem with the following study. An internet poll on a website asks people to indicate whether or not they have a

cable TV subscription. 1974 people respond with 847 indicating that they do have a cable TV subscription.
A.nonresponse

B.voluntary response

C.precise numbers

D.correlation and causality
Mathematics
1 answer:
ratelena [41]3 years ago
3 0

Answer:

B. VOLUNTARY RESPONSE

Step-by-step explanation:

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If DF = 9x-39, find EF.
otez555 [7]

DF=DE+EF\\\\DF=9x-39\\DE=47\\EF=3x+10\\\\\text{substitute}\\\\9x-39=47+3x+10\\9x-39=3x+57\ \ \ |-3x\\6x-39=57\ \ \ \ |+39\\6x=96\ \ \ \ |:6\\x=16\\\\\text{put the value of x to the expression}\ 3x+10\\\\EF=3(16)+10=48+10=58

Answer: EF = 58

7 0
3 years ago
Help mathematics need answer asap
Elina [12.6K]
Idk but it can't be 10 or 9.7 bc a triangle's hypotenuse is always longer than its legs
5 0
3 years ago
A rectangle is placed around a semicircle as shown below. The length of the rectangle is 14mm. Find the area of the shaded regio
Damm [24]

Image is missing, so i have attached it

Answer:

21.07 mm²

Step-by-step explanation:

We will use the Formulas:

Area of semicircle = πr²/2

Area_rectangle = Length x width = Lw

We are given:

Length of rectangle = 14 mm

From the attached image, the diameter of the semicircle is equal to the length of the rectangle.

Thus;

diameter of semicircle = length of rectangle

Therefore,

diameter of semicircle = 14 mm

Also, from the attached image, the radius of the semicircle is equal to the width of the rectangle.

Thus;

diameter of semicircle/2 = radius of semicircle

Hence;

radius of semicircle = 14/2 = 7mm = width of rectangle

Thus;

Area of rectangle = L*w = 14 × 7 = 98 mm²

Area of semicircle = πr²/2 = π×7²/2 = 76.93 mm²

To get the area of the shaded region, we will subtract area of the semi-circle from the area of the rectangle.

Area of shaded region = Area_rectangle - Area_semicircle = 98 - 76.93 = 21.07 mm²

7 0
3 years ago
Which of the properties are correct about slope
pantera1 [17]
A and e is your answer
6 0
2 years ago
What is the product of 26 and -8.23? Do not round your answer.
Gnesinka [82]

Answer:

-213.98

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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