The percent of increase is 25 percent
Answer:

Step-by-step explanation:
Required
Determine the formula of B(x)
B(x) implies that B is a function of x and the input is x
Taking the instructions in the question 1 at a time:
<em>Multiplies the input by 100: </em>
<em></em>
<em>Subtracts 5
: </em>
<em></em>
Hence;

Answer: Plan B
Step-by-step explanation:
First you would find out how much they have to pay the monthly fee in 5 months. Plan A pays $50 in 5 months and Plan B pays $30 in 5 months
Then you find he amount of money that they need to pay for a hundred texts. Plan A spends $25 and Plan B spends $35 .
Then you add the numbers together and Plan A you would pay $75 and Plan B you would spend $65