Answer:
15+0.25(40)=25 dollars total
0.25(40)=10 dollars just for the 40 phone calls
___calls__________money_________
40 = 10
50 = 12.5
60 = 15
70 = 17.5
Explanation:
25 cents times 40 phone calls would be 10 dollars then you have to add the standard 15 dollars per month for the plan to get your total cost per month if you were to make 40 phone calls.