Answer:
38minutes approx
Step-by-step explanation:
Given data
Charges per minute= $1.45
Monthly charge= $45
Let the number of minutes be x
and let the total charges for the month be y
The function for the total charge is
y= 1.45x+45
for y= 100, we want to find x
100= 1.45x+45
100-45= 1.45x
55= 1.45x
Divide both sides by 1.45 to get x
x= 55/1.45
x= 37.93
Hence the number of minutes is 38minutes approx
