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Rashid [163]
3 years ago
11

A dentist conducts a survey to determine whether a certain brand of mouthwash improves gum health more than others. When his pat

ients come in for their regular cleanings, the dentist surveys them about their mouthwash use and makes a conclusion based on the survey results. The conclusion drawn from the study is because the sample is . In this instance, an study was conducted.
Mathematics
2 answers:
kicyunya [14]3 years ago
4 0

Answer: The conclusion drawn from the study is *invalid* because the sample is *biased*. In this instance, an *inappropriate* study was concluded.

crimeas [40]3 years ago
4 0

Answer:

The conclusion drawn from the study is NOT VALID because the sample is BIASED. In this instance, an INAPPROPRIATE study was conducted.

Please mark me brainliest, I really need it.

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Solve for y.<br> 3X+2y=12
Montano1993 [528]
3x + 2y = 12

2y = -3x + 12
  y = -1.5x + 6
3 0
3 years ago
Two cars leave a town at the same time heading in opposite directions. One car is traveling 12 mph faster than the other. After
Katena32 [7]
<span>Find the speed of each car.
Let a be the first car
Let b be the second car
=> a = x miles per hour
=> b = x + 12 miles per hour
=> 2 (x+ x + 12) = 232 miles per hour
=> 2x + 12 = 232
=> 2x + 12 = 116
=> 2x = 116 - 12
=> 2x / 2 = 104 / 2
=> x = 52 (speed of Car A)
=> 52 + 12 = 64 miles per hour (speed of Car B)</span>



4 0
3 years ago
Karen earns $54.60 for working 6 hours. If the amount she earns varies directly with the
Andrei [34K]

Given:

Karen earns $54.60 for working 6 hours.

Amount she earns varies directly with the  number of hours she works.

She need to work to earn an  additional $260.

To find:

Number of hours she need to work to earn an  additional $260.

Solution:

Let the amount of earnings be A and number of hours be t.

According to question,

A\propto t

A=kt     ...(i)

where, k is constant of proportionality.

Karen earns $54.60 for working 6 hours.

54.60=k(6)

Divide both sides by 6.

\dfrac{54.60}{6}=k

9.1=k

Put k=9.1 in (i).

A=9.1t

Substitute A=260 in the above equation.

260=9.1t

Divide both sides by 9.1.

\dfrac{260}{9.1}=t

28.5714=t

t\approx 29

Therefore, she need to work extra about 29 hours to earn an  additional $260.

3 0
2 years ago
a dolphin is swimming 18 feet below the surface of the ocean. there is a coast guard helicopter 75.5 feet above the surface of t
Sever21 [200]

Answer:

93.5

Step-by-step explanation:

I think because u would take -18 -18 + 75.5.

can I have brainlist please.

6 0
2 years ago
What is the measure of the radius of the cone in the diagram below?
kondor19780726 [428]

Answer:

Option (2)

Step-by-step explanation:

Radius of the circular base of the cone = \frac{1}{2}(\text{Diameter of the circular base})

Given in the picture,

Diameter of the circular base = 8 cm

Height of the cone = 6 cm

Therefore, radius of the cone = \frac{8}{2}

                                                 = 4 cm

Option (2) will be the correct option.

6 0
3 years ago
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