Question

Two communications companies offer calling plans. With Company X, it costs 30¢ to connect and

then 5e for each minute. With Company Y, it costs 20¢ to connect and then 4¢ for each minute. Write
and simplify an expression that represents how much more Company X charges, in cents, for n
minutes
Which of these expressions represents how much more Company X charges than Company Y?

OA. (30 + 4n) - (20+5n)
OB. 30n -5- 20n - 4
OC. (30n - 4) - (20n-5)
OD. (30 + 5n) - (20 + 4n)

The expression _ represents how much more Company X charges than Company Y.
(Simplify your answer.)

HELP

Answer 1

D

Explanation:

you can model the amount that each phone plan will cost after n minutes with these linear equations

company X:
`30 + 5n`

company Y: 20 + 4n

if you subtract the functions you can get the function for the

30 + 5n - ( 20 + 4n )