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grigory [225]
3 years ago
15

(NEED HELP ASAP)Determine whether the situation calls for a survey, an observational study, or an experiment. You want to find n

ew car buyers' opinions on the most important options. Question 7 options: survey observational study experiment
Mathematics
1 answer:
vladimir2022 [97]3 years ago
8 0

Answer: The answer is "experiment."

Step-by-step explanation:

This procedure is being used in order to validate a hypothesis, particularly in a research study. In the situation above, you have to validate whether a new reading program can increase reading comprehension or not.

The experiment consists of independent, dependent, and controlled variables. The independent variables are the ones being changed by the researcher, while the dependent variables tell whether the changes in the independent variable is significant. The controlled variables are the ones that are constant.

The dependent variable above is reading comprehension, while the new reading program is the independent variable. Examples of controlled variables are the ages of the participants. The age directly affects the reading comprehension, thus it has to be considered.

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(tan theta+ cot theta)^2= sec^2 theta+cosec^2 theta​
Virty [35]

Answer:

Proved that (\tan \theta + \cot \theta)^{2} = \sec^{2} \theta + \csc^{2} \theta.

Step-by-step explanation:

We have to prove that  

(\tan \theta + \cot \theta)^{2} = \sec^{2} \theta + \csc^{2} \theta

Now, Left hand side  

= (\tan \theta + \cot \theta)^{2}

= \tan^{2} \theta + 2\times \tan \theta \times \cot \theta + \cot^{2} \theta {Since we know the formula (a + b)² = a² + 2ab + b²}

=  \tan^{2} \theta + 2 + \cot^{2} \theta

{Since \tan \theta \times \cot \theta = 1}

= (\tan^{2} \theta + 1) + (\cot^{2} \theta + 1)

= \sec^{2} \theta + \csc^{2} \theta

{Since we know the identities:

\sec^{2} x = \tan^{2} x + 1 and \csc^{2} x = \cot^{2} x + 1}

= Right hand side

Hence, proved.

7 0
3 years ago
2ftx2ftx2ft= what is the square area
mash [69]
8 square ft you would just multiply to find area
8 0
3 years ago
Helena foi a feira com certa quantia. Gastou metade dessa quantia na banca de frutas e um terço dessa quantia na banca de verdur
Aleonysh [2.5K]

Answer:

english pleas

Step-by-step explanation:

5 0
3 years ago
1.  Lisa is working with the system of equations x + 2y = 7 and 2x ‒ 5y = 5. She multiplies the first equation by 2 and then sub
Musya8 [376]
All methods are supposed to be correct in most if not all situations and it should not matter if you use a different method given the options
3 0
3 years ago
Read 2 more answers
Angelo's pet rabbit weighs 1 pound less than twice the weight of Carmen's pet rabbit.Angelo's pet rabbit weighs 9 pounds. Write
attashe74 [19]
W=(9+1)/2 i think? its worded strangely
4 0
3 years ago
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