dentify the type of observational study (cross-sectional, retrospective, or prospective) described below. A research company uses a device to record the viewing habits of about 50005000 households, and the data collected todaytoday will be used to determinenbsp the proportion of households tuned to a particular sportssports program.. Which type of observational study is described in the problem statement?

Answers

Answer 1

Answer:

Answer:

- A cross-sectional study.

Step-by-step explanation:

A Cross-sectional study is demonstrated as the type of observational study in which the data or a representative subset of a population collected at a particular point in time is analyzed.

As per the given details, the observational study conducted by the research company would exemplify 'a cross-sectional study' as it aims to evaluate the data('viewing habits of about 50005000 households) collected at a specific point in time i.e. 'today' in order to 'determine the proportion of households tuning to a particular sports program.'

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3x^2-7x+4=0 solve for x. Write both solutions separated by a comma
Alex has 48 stickers. This is 6 times the 4. Number of stickers Max has. How many stickers does Max have?
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What is the area of a rectangle with a height of 3X and a width of 2X -3

Answers

Answer:6x^2 -9x

Step-by-step explanation:

6x2-9x would be the correct answer

On a trip, the fare was 50¢ for each adult and 25¢ for each child. If 30 passengers paid $12.25, how many adults and children went?Is this the right way to set up the equation?
50x + 25(30 - x) = 1225

Answers

Fare for each adult = 0.50 dollars
Fare for each child = 0.25 dollars
Total number of passengers = 30
Total amount paid for the trip = 30 dollars
Lat us assume the number of adults = x
Then
The number of children = 30 - x
So
0.50x + 0.25(30 - x) = 12.25
50x + 25(30 - x) = 1225
This is the right way of setting up the equation and you have done it correctly.

25x + 50x = 30(1225) is the equation that wouldn't work

Step-by-step explanation:

Given,

Total passenger = 30

There can be only two cases,

Case 1 : Let x be the number of adults,

So, the number of children = 30 - x,

Since, the total fare is $12.25 or 1225¢ ( 1 dollar = 100 cents ) in which 50¢ is for each adult and 25¢ is for each child,

⇒ 50x + 25(30 - x) = 1225,

Case 2 : let x be the number of children,

So, the number of adult = 30 - x,

The equation would be,

⇒ 50(30 - x) + 25x = 1225

Hence, the equations that could not be used to solve the given problem is,

25x + 50x = 30(1225)

Step-by-step explanation:

If 35 is 7 times as many as 5, which other statement is true? 35 is 5 more than 7. 5 is 7 more than 35. 35 is 5 times as many as 7. 5 is 7 times as many as 35.

Answers

Answer:

35 is 5 times as many as 7.

Step-by-step explanation:

5*7 = 7*5

hope this helps! please give brainliest :)

Of 140 seventh-grade students, 15% earn the Presidential Physical Fitness Award. How many students earn the award?

Answers

(15/100) x 140 =21

percentage is always over 100, thus since it's 15%, it becomes 15/100

A) For ΔJKL use the Triangle Proportionality Theorem to solve for x. b) After you have solved for x, what is the Perimeter of ΔJKL?

(SHOW ALL YOUR WORK)

Answers

Answer:

Part a) The value of x is 10

Part b) The perimeter of triangle JKL is $79\ units$

Step-by-step explanation:

Part a) Find the value of x

we know that

The Triangle Proportionality Theorem, states that if a line parallel to one side of a triangle intersects the other two sides of the triangle, then the line divides these two sides proportionally

$(3x-5)/(3x-5+10)=(28-8)/(28)\n \n(3x-5)/(3x+5)=(20)/(28) \n \n(3x-5)(28)=(3x+5)(20) \n \n84x-140=60x+100\n \n84x-60x=140+100\n \n24x=240\n \nx=10$

Part b) we know that

The perimeter of triangle JKL is equal to

$P=JK+KL+JL$

substitute the values

$P=(3x+5)+28+16=3x+49$

substitute the value of x

$P=3(10)+49=79\ units$

1. Sarah has an average of 92.5 for her 3 science tests. What does she need to make on the 4th test to get a 94% average. 2.The pep club is selling flower arrangements with a choice of 4 different types of flowers, 3 kinds of greenery, and with or without baby's breath. How many different flower arrangement's do they offer.

Please give me the explanations, not just the answers. Also please hurry, I need the answers quick.

Thanks!

Answers

1) set up a problem
you know you want to get an avg of 94 but how do you do avg in the first place. you add up the numbers then divde by the total number of numbers used lol

so $(92.5+x)/(2)=94$
92.5 is the avg number for the last 3 tests
"x" is the 4th test score which we want to find out
"2" is the total number of numbers being added together

so now lets get x to one side

92.5+ x=94*2 (multiply 2 to both sides)
92.5+x=188
x=188-92.5 (subtract 92.5 from both sides)
x= 95.5 this is the score she need to make to avg 94%

2) you can draw a tree diagram. for example Flower1 branches off into 3 diff greens and then each of those greens branch off into 2 for with or with babies breath.

or you can simple multiply 4*3*2. you can do this because all choices are included with no restriction

your total number of options is 24

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