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dmitriy555 [2]
3 years ago
5

Mike wants to conduct a survey to find how much time the students of his school spent watching television. Which of the followin

g is an appropriate statistical question for this survey?
Who watched television on weekends?
How many hours per week do you watch television?
Who watches television the most on Monday nights?
How many students watch television for an hour every day?
Mathematics
1 answer:
Allisa [31]3 years ago
3 0

Answer:

How many hours per week do you watch television?

Step-by-step explanation:

In order to conduct a proper survey about a specific topic, it is necessary to be direct and clear. In the case of time spent by students watching TV, asking this question would be effective enought to collect necessary data so as to provide useful and good quality information, which will result in a sucessful survey.

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Bond [772]

Answer:

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Step-by-step explanation:

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3 years ago
Un triángulo rectángulo tiene un área de 84 pies2 y una hipotenusa de 25 pies de largo. ¿Cuáles son las longitudes de sus otros
jolli1 [7]

Answer:

7 feet and 24 feet

Step-by-step explanation:

In the right triangle, the hypotenuse is 25 feet long. The area of this triangle is 84 square feet.

Let x feet and y feet be the lengths of triangle's legs.

By the Pythagorean theorem,

x^2+y^2=25^2\\ \\x^2+y^2=625

The area of the right triangle is half the product of its legs, thus

84=\dfrac{1}{2}xy\\ \\xy=168

Solve the system of two equations:

\left\{\begin{array}{l}x^2+y^2=625\\ \\xy=168\end{array}\right.

From the second equation:

x=\dfrac{168}{y}

Substitute it into the first equation:

\left(\dfrac{168}{y}\right)^2+y^2=625\\ \\168^2+y^4=625y^2\\ \\y^4-625y^2+168^2=0\\ \\D=(-625)^2-4\cdot 168^2=(625-2\cdot 168)(625+2\cdot 168)=289\cdot 961=17^2\cdot 31\\ \\\sqrt{D}=17\cdot 31=527\\ \\y^2_{1,2}=\dfrac{-(-625)\pm 527}{2}=49,\ 576\\ \\y_1=7,\ y_2=-7,\ y_3=24,\ y_4=-24

The length of the leg cannot be negative, so

y_1=7\Rightarrow x_1=\dfrac{168}{7}=24\\ \\y_2=24\Rightarrow x_2=\dfrac{168}{24}=7

6 0
3 years ago
When finding the unit rate, the words per and each tell us what unit of measure needs to equal ONE. True or False
Nuetrik [128]

Answer: Its true, Hope this helped

5 0
3 years ago
Compute the total pay:
stiv31 [10]

Answer:

$112.65

Step-by-step explanation:

7.25 x 8 = 58

58 + 54.65 = 112.65

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3 years ago
Mrs. Yang bought 5 chickens and 3 ducks for $81. A chicken cost $5 more than a duck.
anygoal [31]

The cost of each duck is $ 7 and cost of each chicken is $ 12.

Step-by-step explanation:

Given,

5 chickens and 3 ducks are bought by $ 81

A chicken costs $ 5 more than a duck.

To find the cost of each duck and cost of each chicken.

Let,

The cost of each duck = x

The cost of each chicken = x+5

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