Two communications companies offer calling plans. With Company X, it costs 35 cents to connect and then 5 cents for each minute. With Company Y, it cost 15 cents to connect and then 4 cents for each minute.
Which of these expressions represents how much more Company X charges than Company Y?
A. (35 + 4n) - (15 + 5n)
B. 35n - 5 - 15n - 4
C. (35n - 4) - (15n -5)
D. (35 + 5n) - (15 + 4n)

The answer is D.

Step-by-step explanation:

Since Company X charges more, we are going to subtract Company Y's costs from Company X's costs. Company X costs 35 to connect (constant amount, so no variable goes with it). Then it charges 5 cents per minute to stay connected (5 times a variable; in this case the question states n, probably for number of minutes) so 5n. Therefore, Company X charges 35+5n. Company Y charges 15 cents to connect (constant, no variable). After that, it charges 4 cents per minute (4n). The total cost for Company Y is 15+4n.

Company X - Company Y

(35 + 5n)      -    (15+4n)

That is choice D.

Answer A switches the cost per minute of the companies.

Answer B puts the variables with the constants, and subtracts the minutes from Company X.

Answer C subtracts the cost per minute and also has the variables with the constants.

im not sure

step-by-step explanation: