In 2017, solar and wind electricity generation totaled 218 thousand megawatt hours (mwh) wind generated 2 thousand mwh more than seven times that generated by solar energy. how much was generated by each sourc

W=191,000MWH S=27,000MWH

Step-by-step explanation:

OK, let's W be wind electricity generated and S, solar electricity generate.

TOTAL GENERATED: 218,000mwh = W + S

RELATION BETWEEN W AND S: W = 2,000mwh + 7S

We have now two equations:

218,000 = W + S

W = 2,000 + 7S

Put th value of W into the 1st equation in order to find S:

218,000 = 2,000 + 7S + S

218,000 = 2,000 + 8S

218,000 - 2,000 = 8S

216,000 = 8S

S = 216,000/8

S = 27,000mwh

Now, we find W.

W = 2,000 + 7*27,000mwh

W = 2,000 + 189,000mwh

W = 191,000mwh

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.

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour