The Call First cell phone company charges $45 per month and an additional $0.24 for each text message sent during the month. Another cell phone company, Cellular Plus, charges $65 per month and an additional $0.23 for each text message sent during the month.

2000

Step-by-step explanation:

Let be the total number of text messages sent per month in order for the plans to cost the same each month.

The first cell phone company, The Call, charges $45 per month and $0.24 per text message for the month.

So, the total cost as per the plan of The Call, for x text messages during the month, is

Another cell phone company, Cellular Plus, charges $65 per month and $0.23 per text message for the month.

So, the total cost as per the plan of Cellular Plus, for x text messages during the month, is

As the cost for both the companies are the same, so, compute the number of text messages, x, during the month by equation and from equation (i) and (ii), we have

Hence, there must be 2000 text message to be sent during the month in order to have the same cost from both the companies.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

step-by-step explanation: