Is the statement "the solution set of a linear system involving variables x 1 comma comma x subscript n is a list of numbers left parenthesis s 1 comma comma s subscript n baseline right parenthesis that makes each equation in the system a true statement when the values s 1 comma comma s subscript n are substituted for x 1 comma comma x subscript n baseline comma respectively" true or false? explain. a. true, because the solution set of a linear system will have the same number of elements as the list of the variables in the system. b. true, because the list of variables left parenthesis x 1 comma comma x subscript n baseline right parenthesis and the list of numbers left parenthesis s 1 comma comma s subscript n baseline right parenthesis have a one-to-one correspondence. c. false, because the description applies to a single solution. the solution set consists of all possible solutions. d. false, because the list of numbers left parenthesis s 1 comma comma s subscript n baseline right parenthesis is the solution set for a linear system involving the variables x 1 comma comma x subscript n minus 1 baseline .

1. the program must provide following functions to extract some statistics. note that the data_list parameter specified in these functions may be the same for all functions or different for different functions—that is your choice. a skeleton file is provided on mirmir. a) open_file()prompts the user to enter a year number for the data file. the program will check whether the year is between 1990 and 2015 (both inclusive). if year number is valid, the program will try to open data file with file name ‘year. txt’, where is the year. appropriate error message should be shown if the data file cannot be opened or if the year number is invalid. this function will loop until it receives proper input and successfully opens the file. it returns a file pointer and year. i. hint: use string concatenation to construct the file name b) read_file(fp)has one parameter, a file pointer read. this function returns a list of your choosing containing data you need for other parts of this project. c) find_average(data_list) takes a list of data (of some organization of your choosing) and returns the average salary. the function does not print anything. hints: i. this is not the average of the last column of data. it is not mathematically valid to find an average by finding the average of averages—for example, in this case there are many more in the lowest category than in the highest category. ii. how many wage earners are considered in finding the average (denominator)

Write a function so that the main program below can be replaced by the simpler code that calls function original main program: miles_per_hour = float( minutes_traveled = float( hours_traveled = minutes_traveled / 60.0 miles_traveled = hours_traveled * miles_per_hour print('miles: %f' % miles_traveled) sample output with inputs: 70.0 100.0 miles: 116.666667

How much current flows through the alternator brushes? a. 2–5 a b. 25–35 a, depending on the vehicle c. 5–10 a d. 10–15 a