Aboard 65 inches long is sawed into two pieces, so that one piece is 7 inches shorter than twice the length of the other piece ? find the length of the two pieces

The length of the two pieces are 41 in and 24 in

Step-by-step explanation:

Let

x -----> the length of one piece

y ----> the length of the other piece

we know that

-----> equation A

-----> equation B

Solve the system of equations by substitution

Substitute equation B in equation A and solve for y

Find the value of x

therefore

The length of the two pieces are 41 in and 24 in

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

need more detail

step-by-step explanation:

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