Question

Two communications companies offer calling plans. With Company X, it costa 25 to connect and then 6¢ for each minute. With Company Y, it costs 20¢ to connectand then 4 for each minute. Writo and simplify an expression that represents how much more Company Xcharges, in cents, for n minutes.Which of these expressions represents how much more Company X charges than Company Y?A. (2514) - (20n - 5)B. (25+5) - (20+4n)C. 25-5-20-4D (25+4n) - (20+5)

Answer 1

Solution

For this case we can see that the total cost for company X is:

Cx= 25 + 5n

And for the company Y is given by:

Cy= 20 + 4n

And if we want the difference we have:

Cx -Cy

(25 +5n) - (20 +4n)

After simplify the best option would be:

B