Tracy is saving to buy a new guitar that costs $253.77 (including tax). tracy has saved $136.27, and she can save $23.50 each week.

how many more weeks will it take her to save enough money?
2 weeks
5 weeks
7 weeks
10 weeks

Option B., 5 weeks

Step-by-step explanation:

Tracy is saving to buy a new guitar that costs = $253.77

Tracy has already saved = $136.27

Now she needs = 253.77 - 136.27

                          = $117.50

She can save each week = $23.50

Tracy will take weeks to save enough money =

                                                                           = 5 weeks

Option B. 5 weeks is the answer.

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.

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.